Read the passage carefully, then choose the correct answers.

The dramatic growth of the world's population in the twentieth century was on a scale without parallel in human history. Most of this growth had occurred since 1950 and was known as the population 'explosion'. Between 1950 and 1980 the world population increased from 2.5 to over 4 billion, and by the end of the twenty century the figure had risen to about 6.6 billion. Growth of this size cannot continue indefinitely. Recent forecasts suggest that the total population will level out at between 10 and 15 billion in the mid twenty first century. Already there are encouraging signs that the rate of increase in many less developed countries is beginning to slow down.

In 2000, the world's population was about ______.

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Previously, people often only considered second-hand smoke as a welfare issue, focusing on the smell and the irritation that tobacco smoke causes to eyes, nose and throat. But now the weight of evidence for much more serious risks to health from second-hand smoke has grown too great to ignore. Tobacco smoke contains around 4,000 chemicals, including arsenic, benzene, formaldehyde and ammonia. Around 60 of these chemicals are known or suspected to cause cancer. Many of the toxic chemicals are actually more concentrated in the smoke that’s given off by the burning tip of a cigarette (sidestream smoke). Around 85 per cent of the smoke in a room where people are smoking is the more toxic sidestream smoke. By breathing in it in the atmosphere, the non-smoker is exposed to many of the same health risks as the smoker. The best known risk to smokers, lung cancer, is also more common in people regularly exposed to second-hand smoke. The Government’s Scientific Committee on Tobacco and Health (SCOTH) reported in 1998 that exposure to second-hand smoke increases the risk of lung cancer in non-smokers by 20-30 per cent. Even though they inhale only 1% of the smoke, non-smokers exposed to second-hand smoke may suffer 25 per cent of the increased risk of heart disease associated with active smoking (one recent study suggests it might be as much as 50 per cent). Just 30 minutes of breathing second-hand smoke can reduce the coronary blood supply of a non-smoker to the same level as that of a smoker. A study in New Zealand found that exposure to second-hand smoke increases the risk of stroke by 82 per cent in non-smokers. This is a serious concern, as stroke is such a common condition. Moreover, around 3.4 million people in the UK have asthma and for most of these, tobacco smoke is a trigger for an asthma attack. For someone with asthma, just one hour of exposure to second-hand smoke can cause a 20 per cent deterioration in lung function. During pregnancy, breathing in second-hand smoke increases the risk of having a baby with a low birth weight. Small babies are at much greater risk of infections and other health problems. A recent review of international research on the immediate health impact of smokefree workplace legislation found rapid and dramatic improvements. Air quality, respiratory health and levels of heart attacks and heart disease all improved substantially within months of the legislation being introduced.
1. There has been greater focus on the dangers of second-hand smoke since

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

It is estimated that by 2050 more than two-thirds of the world's population will live in cities, up from about 54 percent today. While the many benefits of organized and efficient cities are well understood, we need to recognize that this rapid, often unplanned urbanization brings risks of profound social instability, risks to critical infrastructure, potential water crises and the potential for devastating spread of disease. These risks can only be further exacerbated as this unprecedented transition from rural to urban areas continues.
 How effectively these risks can be addressed will increasingly be determined by how well cities are governed. The increased concentration of people, physical assets, infrastructure and economic activities mean that the risks materializing at the city level will have far greater potential to disrupt society than ever before.
 Urbanization is by no means bad by itself. It brings important benefits for economic, cultural and societal development. Well managed cities are both efficient and effective, enabling economies of scale and network effects while reducing the impact on the climate of transportation. As such, an urban model can make economic activity more environmentally-friendly. Further, the proximity and diversity of people can spark innovation and create employment as exchanging ideas breeds new ideas.
 But these utopian concepts are threatened by some of the factors driving rapid urbanization. For example, one of the main factors is rural-urban migration, driven by the prospect of greater employment opportunities and the hope of a better life in cities. But rapidly increasing population density can create severe problems, especially if planning efforts are not sufficient to cope with the influx of new inhabitants. The result may, in extreme cases, be widespread poverty. Estimates suggest that 40% of the world's urban expansion is taking place in slums, exacerbating socio-economic disparities and creating unsanitary conditions that facilitate the spread of disease.
 The Global Risks 2015 Report looks at four areas that face particularly daunting challenges in the face of rapid and unplanned urbanization: infrastructure, health, climate change, and social instability. In each of these areas we find new risks that can best be managed or, in some cases, transferred through the mechanism of insurance.

According to paragraph 3, what is one of the advantages of urbanization? 

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Stories about how people (1)__________ know when they are being watched have  been going around for years. However, few made have been made to investigate the phenomenon scientifically. Now, with the completion of the largest ever study of the socalled staring effect, there is impressive evidence that this is a recognizable and (2) _______ sixth sense. The study involved hundreds of children. For the experiments, they sat with their eyes covered and with their backs to other children, who were told to either stare at them or look away. The results consistently showed that the children who could not see were able to (3) _______ when they were being stared at. In a total of 18,000 trials carried out worldwide, the children correctly sensed when they were being watched almost 70% of the time. The experiment was repeated with the added precaution of putting the children who were being watched outside the room, (4) _______ from the starters by the windows. The results, though less impressive, were more or less the same. Dr. Sheldrake, the biologist who designed the study, believes that the results are (5) _______ enough to find out through further experiments precisely how the staring effect might actually come about.

Each sentence has a mistake. Find it bychosing A B C or D

It said that mathematics is the base of all other sciences, and that arithmetic, the science of number, is the base of mathematic

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Children’s behaviour has worsened over the past five years, according to a survey of  teachers which found that a fifth thought girls were more likely to cause trouble than boys. The survey, published after teachers at a Lancashire school went on strike over discipline, found low-level disruption, including chatting and “horsing around”, was the biggest problem. Boys were more likely to be physically aggressive while girls tended to ostracise other pupils. The behaviour of boys was more of a challenge than that of girls but the actions of each sex had deteriorated, according to 56.5% of staff surveyed by the Association of Teachers and Lecturers (ATL).  Among male pupils the most challenging behaviour for teachers was physical aggression, such as pushing, spitting, kicking and hitting. A secondary teacher quoted in the survey said boys were usually aggressive with other pupils, while girls tended to call one another names. Teachers criticised a lack of role models in the home. A primary teacher said: “The boys are far more willing to be aggressive to adults, verbally and even physically. There don’t seem to be any parental boundaries set of what is an appropriate way to speak and deal with another adult.” Teachers at Darwen Vale high school, Lancashire, walked out over unruly pupil behaviour this month. They said children challenged them to fights and threatened to film lessons and post them online. The survey of more than 850 teachers, heads and other school staff found that more than 21% thought girls’ behaviour was more challenging than boys, compared with 68% who said male pupils caused more trouble. In schools that have excluded pupils, 57% said more boys and 5% said more girls had been excluded. A department head in a primary school told the survey, carried out in March, that “classes with a majority of boys tend to be louder, less co-operative and harder to teach”. Nearly half of the staff surveyed said boys’ bravado was behind their disruption. For girls, the most likely trigger was a break-up between friends. A primary school teacher from Bedfordshire said: "Boys are generally more physical and their behaviour is more noticeable. Girls often say nasty things, which end up disrupting the lesson just as much as the boys, as other children get upset and can’t focus on their work. They are usually the ones who refuse to comply with instructions." Some staff had noticed girls’ behaviour worsening.” A teaching assistant from Weston-super-Mare said: “Girls are definitely getting more violent, with gangs of girls in school who are getting worse than the gangs of boys.” The ATL annual conference in Liverpool on Monday is due to debate a motion expressing concern at increasing numbers of girls being excluded from secondary school.  Government figures for 2008-9 showed that boys represented 78% of the total number of permanent exclusions from schools in England. This proportion was unchanged from the year before. The ATL general secretary, Mary Bousted, said: "Staff get ground down daily by the chatting and messing around, which disrupts lessons for other pupils and takes the pleasure out of teaching. Even more worrying is the physical aggression, most often among boys but also among some girls, which puts other pupils and staff at risk. Schools need to have firm and consistent discipline policies and work with parents to keep schools and colleges safe places for pupils and staff alike." The education bill, now going through the Commons, will give teachers the right to search pupils for banned items and will remove the requirement to give parents a day’s notice of detention. The education secretary, Michael Gove, said the measures in the bill would “restore discipline” in the classroom.
7. Which of the following best reflects the suggestion of the author to reduce bad behavior of children in the last paragraph?

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Although television was first regarded by many as “radio with pictures,” public reaction to the arrival of TV was strikingly different from that afforded the advent of radio. Radio in its early days was perceived as a technological wonder rather than a medium of cultural significance. The public quickly adjusted to radio broadcasting and either enjoyed its many programs or turned them off. Television, however, prompted a tendency to criticize and evaluate rather than a simple on-off response. One aspect of early television that can never be recaptured is the combined sense of astonishment and glamour that greeted the medium during its infancy. At the midpoint of the 20th century, the public was properly agog about being able to see and hear actual events that were happening across town or hundreds of miles away. Relatively few people had sets in their homes, but popular fascination with TV was so pronounced that crowds would gather on the sidewalks in front of stores that displayed a working television set or two. The same thing happened in the typical tavern, where a set behind the bar virtually guaranteed a full house. Sports events that might attract a crowd of 30,000 or 40,000 suddenly, with the addition of TV cameras, had audiences numbering in the millions. By the end of television’s first decade, it was widely believed to have greater influence on American culture than parents, schools, churches, and government-institutions that had been until then the dominant influences on popular conduct. All were superseded by this one cultural juggernaut. The 1950s was a time of remarkable achievement in television, but this was not the case for the entire medium. American viewers old enough to remember TV in the ’50s may fondly recall the shows of Sid Caesar, Jackie Gleason, Milton Berle, and Lucille Ball, but such high-quality programs were the exception; most of television during its formative years could be aptly described, as it was by one Broadway playwright, as “amateurs playing at home movies.” The underlying problem was not a shortage of talented writers, producers, and performers; there were plenty, but they were already busily involved on the Broadway stage and in vaudeville, radio, and motion pictures. Consequently, television drew chiefly on a talent pool of individuals who had not achieved success in the more popular media and on the young and inexperienced who were years from reaching their potential. Nevertheless, the new medium ultimately proved so fascinating a technical novelty that in the early stages of its development the quality of its content seemed almost not to matter. Fortunately, the dearth of talent was short-lived. Although it would take at least another decade before areas such as news and sports coverage approached their potential, more than enough excellence in the categories of comedy and drama emerged in the 1950s to deserve the attention of discriminating viewers. They are the most fondly remembered of the Golden Age genres for both emotional and intellectual reasons. Live TV drama was, in essence, the legitimate theatre’s contribution to the new medium; such shows were regarded as “prestige” events and were afforded respect accordingly. The comedies of the era are remembered for the same reason that comedy itself endures: human suffering and the everelusive pursuit of happiness render laughter a necessary palliative, and people therefore have a particular fondness for those who amuse them  
6. The word “dearth” in the last paragraph is closest in meaning to ______

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What results in good health and longevity? It’s good genes, good lifestyle and good luck. But since we can’t choose our parents, or know what fate holds in store for us, we must treat lifestyle with tender, loving care. Now, a report “Circulation” proves that a sound lifestyle adds 12 to 14 more years to life. For instance, a woman, aged 50, who follows these lifestyle rules can expect to live to 93 years. This compares to a woman who indulges in an unhealthy lifestyle and dies at 79. In men, the increase in longevity from a healthy lifestyle is from 76 to 88 years. In the general population, the U.S. spends more money on health care than any other country. So why are so many people in North America suffering from ill health? It is quite apparent that the epidemic of obesity, type 2 diabetes and heart attack will continue to be the big killers. At the moment there is little evidence this battle is being won. But a study that followed both staff and students at the University of Liverpool shows it’s not an impossible dream. In its first experiment, female diners were randomly divided to receive either a small or large quiche for lunch. The next day, the same group were all allowed to serve themselves any portion they desired. Researchers discovered the ones who had been served the smaller portion, tended to choose the smaller portion. A second experiment tested male diners and it produced the same result. In the third experiment both sexes were included, but it was done one week later. This time diners were asked to look at various photos of portion size and asked which looked normal. Those who were previously given the smaller portions considered the smaller ones normal.  These studies showed that it is possible to shift people from what they think is a normal portion to what is actually the proper amount to eat. And that the perception of what is normal lasts at least to one week later. Remember, a voyage of a thousand miles begins with the first step. The same philosophy applies to longevity. So, gradually incorporate one thing at a time into your lifestyle. Don’t forget the importance of smaller portions, add more fruits and vegetables, buy a pedometer to check the number of steps taken each day, and to measure your progress, step on the scale every day  
2. The word “tender” in paragraph 1 is closest in meaning to _______

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Certainly no creature in the sea is odder than the common sea cucumber. All living creature, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about a bizarre animal that, among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets? For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tube feet, under rocks in shallow water, or on the surface of mud flats. Common in cool water on both Atlantic and Pacific shores, it has the ability to such up mud or sand and digest whatever nutrients are present. Sea cucumbers come in a variety of colors, ranging from black to reddish-brown to sand-color and nearly white. One form even has vivid purple tentacle. Usually the creatures are cucumber-shaped-hence their name-and because they are typically rock inhabitants, this shape, combine with flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents. Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to become quiescent and live at a low metabolic rate-feeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in a short time and would probably starve themselves out of existence. But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs, when attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself if it is attached or even touched; it will do the same if the surrounding water temperature is too high or if the water becomes too polluted.
1. What does the passage mainly discuss?

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Can a performance go viral? Ben Platt’s should. As the title character in Dear Evan Hansen, the new musical from Benj Pasek and Justin Paul, he offers acting so precise yet so painfully lucid that it should overwhelm the operating systems by which most contemporary musicals operate. Platt’s gestures, his expressions, his phrasing, even his vocal range – which is impressive but tends to thin out toward the top notes – all combine to communicate the fretfulness, uncertainty and timorous goodness that define his character. He plays Evan, a friendless high school senior terrified of life, the universe, everything. His harried single mother, Heidi, (Rachel Bay Jones) tells him, “You can’t succeed if you never try.” Evan nods, but you can that he believes more strongly in the corollary: “If you don’t try, you can’t fail.” A therapist has instructed him to write pep-talk letters to himself. On the first day of school, one of them falls into the hands of Connor Murphy (Mike Faist), another outcast with drug problems and a look a peer describes as “school shooter chic”. When Connor kills himself, his parents find the letter and mistakenly believe that Evan was a friend to their son. At first this attention panics Evan, but he soon accepts the role and even briefly becomes an internet sensation. Often he is tempted to tell Connor’s family the truth, but he fears disappointing them and sacrificing his newfound confidence Watching Dear Evan Hansen, one often thinks of Next to Normal, another Second Stage show about a mentally distressed protagonist. But with its tuneful pop score and teenage protagonist, Dear Evan Hansen is a gentler affair, even as it takes occasional pains not to oversentimentalize the material. When Evan presents a surprisingly rosy picture of her brother, his sister Zoe (Laura Dreyfuss) sings, “Don’t say it wasn’t true/ That you were not the monster/ That I knew.” Near the play’s end, Platt positively glistens with sweat and spit and tears. Yet one never has the sense of an actor deliberately winding himself up to deliver a visceral performance. There’s obvious care taken in the way he offers Evan’s cringing smile, his swallowed laugh, his habit of pulling at his clothes as though searching for someone to hold onto. But all of these details feel lived, organic, unrehearsed. And Platt’s ability to convey emotion through song is simply superb and often deeply heartrending.  
2. The word “it” in paragraph 1 refers to _____

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A fold culture is small, isolated, cohesive, conservative, nearly self-sufficient group that is homogeneous in custom and race, with a strong family or clan structure and highly developed rituals. Order is maintained through sanctions based in the religion or family, and interpersonal relationships are strong. Tradition is paramount, and change comes infrequently and slowly. There is relatively little division of labor into specialized duties. Rather, each person is expected to perform a great variety of tasks, though duties may differ between the sexes. Most goods are handmade, and a subsistence economy prevails. Individualism is weakly developed in folk cultures, as are social classes. Unaltered folk cultures no longer exist in industrialized countries such as the United States and Canada. Perhaps the nearest modern equivalent in Anglo-America is the Amish, a German American farming sect that largely renounces the products and labor saving devices of the industrial age. In Amish areas, horse-drawn buggies till serve as a local transportation device, and the faithful are not permitted to own automobiles. The Amish's central religious concept of Demut, “humility”, clearly reflects the weakness of individualism and social class so typical of folk cultures, and there is a corresponding strength of Amish group identity. Rarely do the Amish marry outside their sect. The religion, a variety of the Mennonite faith, provides the principal mechanism for maintaining order.
By contrast, a popular culture is a large heterogeneous group, often highly individualistic and constantly changing. Relationships tend to be impersonal, and a pronounced division of labor exists, leading to the establishment of many specialized professions. Secular institutions, of control such as the police and army take the place of religion and family in maintaining order, and a money-based economy prevails. Because of these contrasts, “popular” may be viewed as clearly different from “folk”. The popular is replacing the folk in industrialized countries and in many developing nations, Folk- made objects give way to their popular equivalent, usually because the popular item is more quickly or cheaply produced, is easier or time saving to use, or lends more prestige to the owner.

The phrase “largely renounces” is closest in meaning to     .

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Continuing education is required for workers to stay current with the latest developments, skills, and new technologies required for their fields. Certain professions also require continuing education to comply with laws, remain licensed or certified, or maintain membership in an association or licensing body. Many careers require continuing education. For example, teachers, real estate agents, and engineers are required to have a base of education and then receive updated education as they continue to work in their fields. Nursing, pharmacy, accounting, and criminal justice are additional fields in which professionals must continue to develop the skills necessary for ever-changing environments. For nurses, there are typically two types of continuing education. The first is required for them to remain licensed in their states. The second type of continuing education allows them to get more advanced degrees and qualify for higher-level nursing positions. In the fastpaced pharmacy field, continuing education is important for career growth and licensure. Pharmacists need continuing education to renew their state licenses. Continuing education focuses on subject areas in health care, including pharmacology, patient counseling, regulatory issues, and other topics that contribute to professional pharmacy practice.  Certified public accountants (CPAs) must meet continuing education requirements established by the State Board of Accountancy of the states where their CPA licenses are held. The requirements vary from state to state. The American Institute of CPAs (AICPA) also requires certain continuing education for CPAs to maintain membership. Meanwhile, criminal justice professionals need to stay up-to-date on the new laws, procedures, and technologies to reinforce the knowledge they have already gained. Criminal justice and legal fields include a variety of jobs, such as probation and parole officers, summary court officials, emergency management personnel, and crime scene technicians. Many of these careers require an undergraduate degree for entry, and then professionals must complete continuing education courses as they progress in their careers. Crime scene investigators and evidence technicians must maintain certifications specific to the collection, processing, and maintenance of evidence. Traffic crash reconstructionists must maintain accredited certifications. Emergency management professionals must complete and maintain certifications for their respective states and the Federal Emergency Management Agency (FEMA). Howard concluded “Today’s professionals must, therefore, commit to a ‘life-long learning’ philosophy that enhances effectiveness, diagnose and more quickly solves problems, while moving away from the traditional autocratic management styles.” Whether it is required or not, continuing education can be important for career satisfaction.  
1. Which best serves as the title for the passage?

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Do you find the American education system to be confusing and different from the education system in your own country? Do you want to attend a university or a school in the USA? The American education system offers international students the most diverse set of options in the world. In fact, an international student who elects to take advantage of the American education system can pursue anything from nuclear science to film and dance. The possibilities are almost endless! The American education system requires that students complete 12 years of primary and secondary education prior to attending university or college. This may be accomplished either at public (or government-operated) schools, or at private schools. These 12 years of schooling (or their equivalent) may also be completed outside the USA, thus giving foreign students the opportunity to pursue the benefits of the American education system and obtain a quality American education. Perhaps one of the most impressive facts is the large number of presidents, prime ministers and leaders from other countries who have experienced the American education system and graduated from a university or school in the USA. In many fields and industries, the American education system offers the most cutting-edge, soughtafter programs at the world’s best schools. That is why graduating from an accredited American school and being exposed to the rigors of the American education system is an investment in your future. Whether you want to study at a USA university, a top college, or at an ESL, vocational or high school, a thorough understanding of how the American education system works is essential. Without a clear grasp of the system, an international student will find it difficult to make the right academic choices. The information provided in the Overview of the American education system section will help you develop that understanding. You can also search our list of Universities, colleges, community colleges, graduate schools, and boys and girls boarding schools. It is no surprise that the United States hosts more international students than any other country in the world!  
3. Which of the following is true, according to the passage?

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While good grades are important and should be something every student strives for, they do not necessarily correlate with a student’s intelligence. Students should worry less about their grades and instead care more about retaining the content they are learning and gaining actual knowledge. David Thomas, a principal lecturer at ASU, said there are varying theories about intelligence. One of them is the entity theory of intelligence, which describes intelligence as being stable throughout someone’s life. Thomas said there are also people who think just the opposite, and that a person can become more intelligent throughout their life. While there are varying theories on what intelligence is and whether it can improve, you can gain knowledge throughout the course of your life. This principle should be the focus of education, not a person’s grades. Every student at ASU is preparing for a career and learning the necessary skills to do well in their desired industry. Getting an “A” on a test will not mean anything if you cannot apply the material you learned to real-life situations. Just because someone gets an “A” in a class or is in Barrett, the Honors College, it doesn’t define intelligence. Similarly, someone who gets a “D” in a class is not necessarily unintelligent, as there are other factors that play into grades. Take Bill Gates for example, a very wealthy and successful man who dropped out of Harvard University two years into his degree and later became the co-founder of Microsoft. He is intelligent, and yet he did not have a college degree when he started his company. Additionally, Thomas said motivation plays a big part in a person’s grades. A student with mastery-oriented motivation approaches a class with curiosity and an interest in the subject, whereas a student with performance-orientated motivation does so solely from a grade standpoint. If people spent the same amount of time working to ensure they retain important information as they did pulling all-nighters to cram for finals, they could become be more intelligent. Students should focus on developing their critical thinking and problemsolving skills rather than simply memorizing information for a test. A transcript only shows a student’s motivation, dedication and work ethic — not their personality, humor, work or life experiences. While grades still matter, we need to stop weighing our intelligence through grades and instead recognize that intelligence comes in all forms.
8. Which of the following can be inferred from the passage?

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According to the American Red Cross, there’s a 97% chance that someone you know will need a blood transfusion. Blood donors — especially donors with certain blood types — are always in demand. To donate blood, the American Red Cross requires that people be at least 17 years old and weigh more than 110 pounds. (In some states, the age is 16 with a parent’s permission.) Donors must be in good health and will be screened for certain medical conditions, such as anemia. Donors who meet these requirements can give blood every 56 days. Blood donation starts before you walk in the door of the blood bank. Eat a normal breakfast or lunch — this is not a good time to skip meals — but stay away from fatty foods like burgers or fries. And be sure to drink plenty of water, milk, or other liquids. Before donating, you’ll need to answer some questions about your medical history, and have your temperature, pulse, blood pressure, and blood count checked. The medical history includes questions that help blood bank staff decide if a person is healthy enough to donate blood. They’ll probably ask about any recent travel, infections, medicines, and health problems. Donated blood gets tested for viruses, including HIV (the virus that causes AIDS), hepatitis B, hepatitis C, syphilis, and West Nile virus. If any of these things are found, the blood is destroyed. Because blood can be infected with bacteria as well as viruses, certain blood components are tested for contamination with bacteria as well.  Are there any risks? A person can’t get an infection or disease from giving blood. The needles and other equipment used are sterile and they’re used only on one person and then thrown away. The U.S. Food and Drug Administration (FDA) regulates U.S. blood banks. All blood centers must pass regular inspections in order to keep operating. Sometimes people who donate blood notice a few minor side effects like nausea, lightheadedness, dizziness, or fainting, but these symptoms usually go away quickly. The donor’s body usually replaces the liquid part of blood (plasma) within 72 hours after giving blood. It generally takes about 4–8 weeks to regenerate the red blood cells lost during a blood donation. An iron-fortified diet plus daily iron tablets can help rebuild a donor’s red blood supply. The Red Cross estimates that 15% of all blood donors in the United States are high school or college students — an impressive number when you consider you have to be 16 or 17 to donate blood. If you are eligible and want to donate blood, contact your local blood bank or the American Red Cross for more information on what’s involved. You could save someone’s life.  
4. The word “that” in paragraph 3 refers to _____________

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Desertification is creating additional challenges to the survival of endangered animal species in India, according to a senior wildlife official who attended the 14th Conference of Parties (COP14) to the United Nations Convention to Combat Desertification (UNCCD) in New Delhi. A few days earlier, at COP14 in New Delhi, Dr Chandra had said that the statistics on species extinction have been derived from a database of more than 5.6 million specimens, which have lived across India and the neighbouring countries since before independence. The deteriorating pattern in the species’ distribution in geo-special platforms over the past 100 years clearly highlights the concerning impact of deforestation and desertification. Land degradation threatens species like the Great Indian Bustard, which is classified as “critically endangered” by the International Union for Conservation of Nature (IUCN). The Weather Channel India got in touch with Dr Chandra, who said that less than 150 Great Indian Bustards are alive today. “Desertification and land degradation are among the 20-30 risk factors to the survival of Great Indian Bustards,” Dr Chandra told Weather.com. In simple terms, desertification is a process wherein fertile land becomes unusable, typically as a result of a long drought, deforestation, salinisation, intensive agricultural practices, and the excessive usage of insecticides, pesticides and chemicals. Desertification leads to hazardous effects on not just animals, but also on the food chain and the overall biodiversity—right from microscopic organisms to human beings. Deforestation has affected over 30% of the land in India due to over-cultivation, soil erosion and depletion of wetlands. Along with India, the planet as a whole currently stares at the fast-growing threat of land degradation  
3. According to paragraph 3, why is the Great Indian Bustard labelled as “critically endangered”?

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Gender equality is not only a fundamental human right, but a necessary foundation for a peaceful, prosperous and sustainable world. (1) ____, at the current time, 1 in 5 women and girls between the ages of 15-49 have reported experiencing physical or sexual violence by an intimate partner within a 12-month period and 49 countries currently have no laws (2) ____ women from domestic violence. Progress is occurring regarding harmful practices such as child marriage and FGM (Female Genital Mutilation), which has declined by 30% in the past decade, but there is still much work to be (3) ____ to completely eliminate such practices. Providing women and girls with equal (4) ____ to education, health care, decent work, and representation in political and economic decision-making processes will fuel sustainable economies and benefit societies and humanity at large. Implementing new legal frameworks regarding female equality in the workplace and the eradication of harmful practices (5) ____ at women is crucial to ending the gender-based discrimination prevalent in many countries around the world

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200 years ago there were less than one billion humans living on earth. Today, according to UN calculations there are over 7 billion of us. Recent estimates suggest that today’s population size is roughly equivalent to 6.9% of the total number of people ever born. This is the most conspicuous fact about world population growth: for thousands of years, the population grew only slowly but in recent centuries, it has jumped dramatically. Between 1900 and 2000, the increase in world population was three times greater than during the entire previous history of humanity—an increase from 1.5 to 6.1 billion in just 100 years. How the world population is changing is of great importance for humanity’s impact on the Earth’s natural environment, but it also gives reasons to hope for a good future. This is because we have a bigger team of better educated people who can contribute to the solutions that improve global well-being. A picture of the world population in the very long-run shows extremely rapid growth. Indeed, for a long time the world population grew at an increasing rate. However, if we focus on the last couple of decades, we see that this pattern no longer holds, as the annual rate of population growth has been recently going down. 1962 saw the growth rate peak at 2.1%, and it has since fallen to almost half. A long historical period of accelerated growth has thus come to an end. Based on these observations, world history can be divided into three periods marked by distinct trends in population growth. The first period, pre-modernity, was a very long age of very slow population growth. The second period, beginning with the onset of modernity— which was characterized by rising standards of living and improving health—had an increasing growth rate that continued to rise through 1962. Today, the second period is over, and the third period is unfolding; the population growth rate is falling and will likely continue to fall, leading to an end of population growth towards the end of this century.  
3. The word "conspicuous" in paragraph 1 is closest in meaning to ______

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It’s extremely important for kids of middle childhood to continue, or to start to lead a healthy lifestyle, including eating nutritious meals as well as getting plenty of exercise and adequate sleep every day. These positive health habits will help children grow strong, stay healthy, and decrease the likelihood that they will become obese. Childhood obesity rates have increasing dramatically in recent years. According to the Centers for Disease Control, in 2004, 18.8% of school-aged children were obese, versus 4% of children 30 years before in 1974. Children’s skyrocketing rate of obesity is worrisome because it greatly increases children’s risk for remaining obese in adulthood, which in turn raises their risk for heart disease, stroke, cancer, diabetes, and premature death as adults. Obese children may also develop associated health problems during the middle childhood stage, such as high blood pressure, high cholesterol levels, and respiratory problems. Obesity can also set the stage for problems with self esteem, depression, anxiety and social ostracism, and/or being victimized by bullies Healthy diet and adequate exercise are important in preventing Type II diabetes in childhood as well as obesity. Diabetes is a metabolic disease in which the body cannot properly metabolize the sugars from food. Because the body cannot metabolize sugars, the sugars accumulate in the bloodstream instead and ultimately stress children’s kidneys, heart, circulatory system, and eyes. Insulin, which is created in the pancreas, is the chemical that breaks down blood sugar. In Type II diabetes, the body does not produce enough insulin to deal with all the sugars coming into the body. This medical diagnosis used to be called “adult-onset diabetes” because the disorder primarily affected adults with poor eating and activity habits. Today, however, this illness is now diagnosed in America’s children far more than in adults. It is now referred to as “Type II diabetes”, to reflect this shift in prevalence. In contrast to the many youth in America who overeat and don’t get enough exercise, other children become obsessed with over-controlling their food intake and with exercising too much. With the constant barrage of perfect, photoshopped bodies in the media today, many children are feeling pressure at younger and younger ages to imitate those images. Children as young as 6 are reporting that they are trying to lose weight by dieting. Overemphasis on extreme thinness can put children at risk for poor self-esteem, unhealthy exercise patterns, and eating disorders such as anorexia and bulimia. Children who embrace healthy eating and exercise habits during middle childhood will have a much easier time maintaining a healthy lifestyle through adolescence and adulthood than individuals who try to make the shift later in life. Teaching children to habitually eat moderate portion sizes and to choose healthy foods in preference to junk foods becomes increasingly important as children begin to spend more time away from home and gain more independence over their food and activity choices. Even though parents have less control over their children’s eating habits during middle childhood than when children were younger, it remains vital that parents continue to reinforce children’s healthy habits whenever possible. 
4. According to paragraph 3, Type II diabetes starts when _____

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A Tidal Stream Generation system reduces some of the environmental effects of tidal barrages by using turbine generators beneath the surface of the water. Major tidal flows and ocean currents, like the Gulf Stream, can be exploited to extract its tidal energy using underwater rotors and turbines. Tidal stream generation is very similar in principle to wind power generation. Water currents flow across a turbines rotor blades which rotates the turbine, much like how wind currents turn the blades for wind power turbines. In fact, tidal stream generation areas on the sea bed can look just like underwater wind farms. Unlike off-shore wind power which can suffer from storms or heavy sea damage, tidal stream turbines operate just below the sea surface or are fixed to the sea bed. Tidal streams are formed by the horizontal fast flowing volumes of water caused by the ebb and flow of the tide as the profile of the sea bed causes the water to speed up as it approaches the shoreline. As water is much more denser than air and has a much slower flow rate, tidal stream turbines have much smaller diameters and higher tip speed rates compared to an equivalent wind turbine. Tidal stream turbines generate tidal power on both the ebb and flow of the tide. One of the disadvantages of Tidal Stream Generation is that as the turbines are submerged under the surface of the water they can create hazards to navigation and shipping. Other forms of tidal energy include tidal fences which use individual vertical-axis turbines that are mounted within a fence structure, known as the caisson, which completely blocks a channel and force water through them. Another alternative way of harnessing tidal power is by using an “oscillating tidal turbine”. This is basically a fixed wing called a Hydroplane positioned on the sea bed. The hydroplane uses the energy of the tidal stream flowing past it to oscillate its giant wing, similar to a whales flipper, up and down with the movement of the tidal currents. This motion is then used to generate electricity. The angle of the hydroplane to the flow of the tide can be varied to increase efficiency. Tidal energy is another form of low-head hydro power that is completely carbon neutral like wind and hydro energy. Tidal power has many advantages compared to other forms of renewable energy with its main advantage being that it is predictable. However, like many other forms of renewable energy, tidal energy also has its disadvantages such as its inflexible generation times dependant upon the tides and the fact that it operates in the hostile conditions of the oceans and seas
8. According to the passage, which of the following statements about Tidal Stream Generation is TRUE?

Each sentence has a mistake. Find it by chosing A B C or D

Public universities, private universities, arts colleges, and community colleges all has a significant role in higher education in the United States