Find mistakes:
Mai has stayed on her uncle's farm for last week.

 

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
Pollution emitted in industrial areas represents a threat to human health and the surrounding natural resources. We have a tendency to believe that the production processes are the only source of environmental damage, and often forget about the possible long-term effects of harmful production practices. We may think that the closure of these huge industrial areas would improve the quality of the environment. Unfortunately, this ignores the threat of the remaining waste, which is abandoned and poorly stored. It represents an even bigger danger because it stands neglected as it degrades and leaks into the earth without any control at all.
Changes in the water chemistry due to surface water contamination can affect all levels of an ecosystem. It can affect the health of lower food chain organisms and, consequently, the availability of food up through the food chain. It can damage the health of wetlands and damage their ability to support healthy ecosystems, control flooding, and filter pollutants from storm water runoff. The health of animals and humans are affected when they drink or bathe in contaminated water. In addition water-based organisms, like fish and shellfish, can pile up and concentrate contaminants in their bodies. When other animals or humans eat these organisms, they receive a much higher dose of contaminant than they would have if they had been directly exposed to the original contamination.
Contaminated groundwater can badly affect animals, plants and humans if it is removed from the ground by manmade or natural processes. Depending on the study of rocks of the area, groundwater may rise to the surface through springs or seeps, flow sideways into nearby rivers, streams, or ponds, or sink deeper into the earth. In many parts of fhe world, groundwater is pumped out of the ground to be used for drinking, bathing, other household uses, agriculture, and industry.
Contaminants in the soil can harm plants when they take up the contamination through their roots. Eating, breathing in, or touching contaminated soil, as well as eating plants or animals that have piled up soil contaminants can badly affect the health of humans and animals.
Air pollution can cause breathing-related  problems  and  other  bad  health  effects  as  contaminants  are absorbed from the lungs into other parts of the body. Certain air contaminants can also harm animals and humans when they contact the skin. Plants rely on breathing for their growth and can also be affected by exposure to contaminants moved in the air.

The word “if5  in the first paragraph refers to     .

Read the following passage and choose the best answer (A, B, C, D):
Last week, China declared “mission accomplished” after landing a spacecraft, Chang’e-4, on the far side of the Moon. It was a remarkable endeavour. As the far side of the Moon never faces the Earth, mission control cannot communicate directly with the spacecraft, but only via an orbiting satellite. The terrain is more broken and cratered than the near side, so landing a craft is that much more difficult. Even Nasa was impressed: “a first for humanity and an impressive accomplishment!”. Yet mixed with admiration was trepidation. China, a latecomer to the space race, is now beginning to threaten the supremacy of America and Russia. But then Russia and America have long played their space exploration programmes for propaganda purposes. From the beginning, the space race was intimately bound up with the needs of the cold war. In 1957, the Soviet Union launched Sputnik, the first human craft to orbit the Earth. Four years later, Yuri Gagarin became the first man in space. Eight years later, on 21 July 1969, Neil Armstrong and Buzz Aldrin became the first humans to tread on the Moon. Their journey may have been fuelled in part by cold war desperation, but it was also an extraordinary triumph of knowledge and will, an act of the technological sublime. Once America was satisfied that the Soviet Union had been put in its place, space exploration became politically less important. As America downgraded its space ambitions, Chinese aspirations took flight. In 1992, the Chinese government approved the Shenzhou manned spaceflight programme. Eleven years later, Yang Liwei became the first Chinese astronaut in space. Fears about Chinese ambitions have been heightened by the changing context of the space race. During the cold war, America feared the Soviet Union, but was determined to thwart Moscow’s aims. Today, American apprehension stems from the worry that China’s emergence as the dominant global force cannot be checked, nor Beijing’s brutal despotism challenged. As liberal democracy frays in the west and authoritarian capitalism becomes entrenched in the east, self-doubt shapes US attitudes to China. Space exploration has long been fuelled by a mixture of humanistic dreams, technological leaps and tawdry politics. The Chang’e-4 mission is no different. How the space race will play out over the next decade, and what role China will adopt in global politics, remains uncertain. In the meantime, let us celebrate our new perspective of the dark side of the Moon.
7. The following sentences are true, EXCEPT _______

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New data from Akamai, an internet delivery and cloud services company, has exposed that the video game industry remains a growing threat vector for security breaches. Hackers have targeted 12 billion credential stuffing attacks against game websites within a 17-month period The rise and success of credential stuffing attacks is a result of people continuing to reuse the same passwords across multiple accounts. Google identified that 59% of online users reuse passwords. When a data breach happens, user credentials are exposed and can subsequently be found on the internet and the dark web. Cybercriminals use a bot with a list of exposed credentials against a website to gain access to an account on that site. The reason that gaming is subject to so many breaches is twofold; No. 1, most video game companies use low-friction authentication measures because increasing friction drives customer attrition and results in a loss of revenue. The second issue is that from a consumer perspective, gaming is seen as having a low financial risk and, as a result, gamers tend to use less secure passwords. Adding to these challenges is the fact that game developers are pressured to deliver more products at a faster pace, meaning there are more bugs and security issues for cybercriminals to exploit. This has created a perfect storm in the video game industry upon which hackers are all too eager to capitalize.   A significant number of gamers are young — elementary, middle, and high schoolaged — who are less security-conscious and more trusting of people they meet online. To them, privacy is a learned behavior leaving them open to exploitation. They may need to be taught best practices to safeguard their accounts and understand the risks of using weak passwords linked to the games they play. Providing a seamless online experience is paramount in the digital age and, as a result, many organizations balk at implementing robust security procedures for fear of alienating customers. The challenge for the video game industry is to find a balance between increased security without frustrating its players. One notable exception is Microsoft, which has deployed vigorous security measures with Xbox in line with the rest of its business. Without a fundamental change in approach from both gamers and the industry overall, the escalation of this problem shows no signs of slowing down.  
1. Which best serves as the title for the passage?

Choose the best answer:
Max says life in the countryside is _________ than he expected.

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The town of Chichen-Itza was established during the Classic period close to two natural cavities (cenotes or chenes), which gave the town its name “At the edge of the well of the Itzaes”. The cenotes facilitated tapping the underground waters of the area. The dates for this settlement vary according to subsequent local accounts: one manuscript gives 415-35 A.D., while others mention 455 A.D. The town that grew up around the sector known as Chichen Viejo already boasted important monuments of great interest: the Nunnery, the Church, Akab Dzib, Chichan Chob, the Temple of the Panels and the Temple of the Deer. They were constructed between the 6th and the 10th centuries in the characteristic Maya style then popular both in the northern and southern areas of the Puuc hills. The second settlement of Chichen-Itza, and the most important for historians, corresponded to the migration of Toltec warriors from the Mexican plateau towards the south during the 10th century. According to the most common version, the King of Tula, Ce Acatl Topiltzin Quetzalcoatl, or Kukulkan as the Maya translated the name, reportedly took the city between 967 A.D. and 987 A.D. Following the conquest of Yucatán a new style blending the Maya and Toltec traditions developed, symbolizing the phenomenon of acculturation. Chichen-Itza is a clear illustration of this fusion. Specific examples are, in the group of buildings to the south, the Caracol, a circular stellar observatory whose spiral staircase accounts for its name, and, to the north, El Castillo. Surrounding El Castillo are terraces where the major monumental complexes were built: on the north-west are the Great Ball Court, Tzompantli or the Skull Wall, the temple known as the Jaguar Temple, and the House of Eagles; on the north-east are the Temple of the Warriors, the Group of the Thousand Columns, the Market and the Great Ball Court; on the south-west is the Tomb of the High Priest. After the 13th century no major monuments seem to have been constructed at Chichen-Itza and the city rapidly declined after around 1440 A.D. From its abandonment during the 15th century, Chichen-Itza underwent a process of gradual deterioration until the first excavations at the site began more than a century ago. Nevertheless, the excellent materials and building techniques used by the Maya in the construction of the buildings secured that the architectonic, sculptural and pictorial essence of Chichen-Itza would be conserved through the centuries  
3. The word “corresponded” in paragraph 2 is closest in meaning to _______

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Modern society has given significant attention to the promises of the digital economy over the past decade. But it has given little attention to its negative environmental footprint. Our smartphones rely on rare earth metals, and cloud computing, data centers, artificial intelligence and cryptocurrencies consume large amounts of electricity, often sourced from coal-fired power plants. These are crucial blind spots we must address if we hope to capture the full potential of the digital economy. Without urgent system-wide actions, the digital economy and green economy will be incompatible with each other and could lead to more greenhouse gas emissions, accelerate climate change and pose great threats to humanity. The world’s data centers-the storehouses for enormous quantities of information - consume about three percent of the global electricity supply (more than the entire United Kingdom), and produce two percent of global greenhouse gas emissions-roughly the same as global air travel. A report by Greenpeace East Asia and the North China Electric Power University found that China’s data centers produced 99 million tonnes of carbon dioxide in 2018, the equivalent of about 21 million cars driven for one year. Greenhouse gases aren’t the only type of pollution to be concerned about.Electronic waste (e-waste), which is a byproduct of data center activities, accounts for two percent of solid waste and 70 percent of toxic waste in the United States. Globally, the world produces as much as 50 million tonnes of electronic e-waste a year, worth over US$62.5 billion and more than the GDP of most countries. Only 20 percent of this e-waste is recycled. The world and its intractable challenges are not linear-everything connects to everything else. We must raise awareness about these major blind spots, embrace systems leadership (leading across boundaries), boost circular economy ideas (decoupling economic activity from the consumption of finite resources), leverage an eco-economics approach (an environmentally sustainable economy) and encourage policy-makers to explore the interrelationships between government-wide, system-wide and societal results. We must also consider collective problem-solving by bringing together diverse perspectives from both the Global North and the Global South. We should take an inventory of the global and local damages caused by electronic devices, platforms and data systems, and frame issues about the digital economy and its environmental impact in broad societal terms.
4. The word “byproduct” in paragraph 3 is closest in meaning to _______

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Language preservation is the effort to prevent languages from becoming unknown. A language is at (1)______ of being lost when it no longer is taught to younger generations, while fluent speakers of the language (usually the elderly) die. Language is an important part of any society, because it enables people to communicate and express themselves. When a language dies (2)_______, future generations lose a vital part of the culture that is necessary to completely understand it. This makes language a vulnerable aspect of cultural heritage, and it becomes especially important to (3) __________ it. According to the United Nations Educational, Scientific, and Cultural Organization (UNESCO), from facts published in their “Atlas of Languages in Danger of Disappearing,” there are an estimated 6,000 languages spoken worldwide today, and half of the world’s population speaks the eight most common. More than 3,000 languages are reportedly spoken by fewer than 10,000 people each. Ethnologue, a reference work published by SIL International, has cataloged the world’s known (4)_______ languages, and it estimates that 417 languages are on the verge of extinction. There are different factors that can (5)________ a language in danger of becoming extinct. One is when a language is no longer being taught to the children of the community, or at least to a large number of the children. In these cases, the remaining fluent speakers of the language are generally the older members of the community, and when they pass away, the language dies out with them

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
Who talks more - men or women? Most people believe that women talk more. However, linguist Deborah Tannen, who has the studied the communication style of men and women, says that this is a stereotype. According to Tannen, women are more verbal - talk more - in private situations, where they use conversation as the “glue’ to hold relationships together. But, she says, men talk more in public situations, where they use conversation to exchange information and gain status. Tannen points out that we can see these difference even in children. Little girls often play with one ‘best friend’ and their play includes a lot of conversation. Little boys often play games in groups, their play usually involves more doing than talking. In school, girls are often better at verbal skills, while boys are often better at mathematics.
A recent study at Emory University helps to shed light on the roots of this difference. Researchers studied conversation between children aged 3-6 and their parents. They found evidence that parents talk very differently to their sons than they do to their daughters. The startling conclusion was that parents use more language with their girls. Specifically, when parents talk with their daughters, they use more descriptive language and more details. There is also far more talk about emotions, especially with daughters than with sons.

Which sentence best expresses the main idea of the first paragraph?

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For many Americans, Thanksgiving is a special, beloved holiday for eating turkey –  or a vegetarian main course option – and spending time with friends and family. (1) ________, for others, the celebration is deeply controversial – as Thanksgiving has a contentious history that goes far beyond when the first feast was held. In addition to a holiday steeped with cultural appropriation, the period of history in America is frequently whitewashed – which leads many Americans to ignore the holiday. Young children are taught about Thanksgiving in school, where they often learn of the first feast through crafts and drawings. In addition to depictions of turkeys, the Mayflower and the Pilgrims, many children decorate Native American headdresses – (2) _________ frequently bare no resemblance to the headdresses, clothes and feathers worn by the Wampanoag Indians. These inaccurate (3) __________ references are perpetrated each year, making the battle for equality and accurate representation an ongoing one for Native Americans in America. Most Americans think the three-day celebration between the Pilgrims and the Wampanoag Indians in 1621 in Plymouth, Massachusetts was the first Thanksgiving. The Pilgrims and their Native American neighbours had signed a mutual protection treaty the spring before and the feast was in (4) _________ of a successful first harvest.  But from the Pilgrims’ point of view, the first Thanksgiving – meant to be a day set (5) _______ for prayer and worship – took place in July 1623. Governor William Bradford declared a day

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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.  
5. What does the word “it” in paragraph 3 refer to?

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:
Accustomed though we are to speaking of the films made before 1927 as “silent”, the film has never been, in the full sense of the word, silent. From the very beginning, music was regarded as an indispensable accompaniment; when the Lumiere films were shown at the first public film exhibition in the United States in February 1896, they were accompanied by piano improvisations on popular tunes. At first, the music played bore no special relationship to the films; an accompaniment of any kind was sufficient. Within a very short time, however, the incongruity of playing lively music to a solemn film became apparent, and film pianists began to take some care in matching their pieces to the mood of the film.
As movie theaters grew in number and importance, a violinist, and perhaps a cellist, would be added to the pianist in certain cases, and in the larger movie theaters small orchestras were formed. For a number of years the selection of music for each film program rested entirely in the hands of the conductor or leader of the orchestra, and very often the principal qualification for holding such a position was not skill or taste so much as the ownership of a large personal library of musical pieces. Since the conductor seldom saw the films until the night before the y were to be shown (if, indeed, the conductor was lucky enough to see them then), the musical arrangement was normally improvised in the greatest hurry.
To help meet this difficulty, film distributing companies started the practice of publishing suggestions for musical accompaniments. In 1909, for example, the Edison Company began issuing with their films such indications of mood as “pleasant’, “sad”, “lively”. The suggestions became more explicit, and so emerged the musical cue sheet containing indications of mood, the titles of suitable pieces of music, and precise directions to show where one piece led into the next.

Certain films had music especially composed for them. The most famous of these early special scores was that composed and arranged for D. w. Griffith’s film Birth of a Nation, which was released in 1915

The word “them” refers to     .

Find synonym:

They design and carry out projects aiming to reduce fossil fuel consumption, find renewable fuels for public transport, and promote other clean air efforts.

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The knock–on effect of volunteering on the lives of individuals can be profound. Voluntary work helps foster independence and imparts the ability to deal with different situations, often simultaneously, thus teaching people how to (1) _______ their way through different systems. It therefore brings people into touch with the real world, and hence, equips them for the future. Initially, young adults in their late teens might not seem to have the expertise or knowledge to impart to athare that attencher or an ariculturalist or a nurse would have, (2) ________ they do have many skills can help others. And in the absence of any particular talent, their energy and enthusiasm can be harmes the benefit (3) _______ their fellow human beings, and ultimately themselves. From all this, the gain to any community no matter how many volunteers are involved is (4)_______ . Employers will generally look favorably on people (5) _______have shown an ability to work as part of team. It demonstrates a willingness to learn and an independent spirit, which would be desirable qualities in any employee.

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With exams approaching, you should be thinking about how to get better at time management and organize your days so you can strike the right balance between home, work and university life. You should also try and eat some brain food - and no, we don’t mean crisps and energy drinks! By taking the time to arrange your priorities, you can give yourself the best chance of staying on track and being organized during the exam period, which in turn can help reduce stress levels, something that can be the difference between success and failure at university. Take a look at our top time management tips, so that you can do your best at university and also find moments to relax and even earn some money on the side. First and foremost, allow time for planning to avoid repetition. Taking the time to research, plan and think about your work is crucial for good time management. Allow yourself the time to process new information and plan how you are going to use it, as this can help you to avoid having to re-read and repeat any research. One way of effectively planning before researching is to make a list of everything you want to find out, so that you can make notes below each subheading as you go Secondly, avoid procrastination and distraction. One way to avoid procrastination is to think about the different places you have been when studying - where were you the most focused? Where were you most distracted? Is there anything you can do to make studying actually somewhat enjoyable? Remember, what works for one person might not necessarily work for you. For some, studying with friends can limit their productivity. But for others, studying in groups can help to increase motivation and avoid procrastination. Next, exercise to clear your head in between study sessions. Believe it or not, exercise works in the same way sleep does. It can focus your state of mind, helping you to clear your head and boost your brain power in between study sessions. If you’re new to exercise, aim to fit in a 10-minute run here and there, steadily increasing the amount you do as you go on. Finally, ask yourself the question, “Has your organization been effective?” Constantly reviewing and reassessing your schedule can help you to recognize whether you need to make any changes in order to help you complete any university tasks and also have time to relax and spend time with friends and family.  
6. It should be remembered that everyone is ____

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Mr O’Connor, a volunteer firefighter with the New South Wales Rural Fire Service (RFS), has used all seven weeks of his holiday leave, plus his three weeks of allotted sick leave, to fight fires across the state. Mr O’Connor is among the more than 72,000 members of the RFS, a volunteer force that is the largest firefighting service in the world. These volunteer services have been at the front line of the battle against ferocious bush fires across Australia that have already destroyed more than 10.7 million hectares, an area larger than South Korea. The RFS, which began 120 years ago, not only attends to bush fires and home and building fires but also assists in storms, search and rescue operations and car accidents. In 2018, it attended 26,903 incidents, including 10,036 bush fires and 1,283 building fires. Mr Mick Holton, president of the NSW Volunteer Fire Fighters Association, an organisation which represents volunteers, said people step up for various reasons, including altruism, social factors, a sense of adventure, or a desire to protect their own farms or houses. “People are happy to be part of a group that benefits the community. That is a large part of it for most volunteers. People have a sense that they want to help,” he told The Straits Times. But Australia’s bush fires are becoming more severe and more frequent. This year, many, like Mr O’Connor, have made large sacrifices to protect people and homes. Controversially, Prime Minister Scott Morrison agreed in late December to compensate some of the firefighters after coming under heavy pressure to provide them with support. The compensation scheme allows volunteers who are self-employed or work for small businesses to claim A$300 (S$277) per day if they have served more than 10 days this fire season. The maximum payment is A$6,000. But the move had been opposed by some senior firefighters, including the RFS Commissioner, Mr Shane Fitzsimmons, who has said that “For goodness sake, let’s not take away from the extraordinary spirit that is volunteerism.” But Mr Morrison insisted that: “While I know RFS volunteers don’t seek payment for their service, I don’t want to see volunteers or their families unable to pay bills or struggle financially as a result of the selfless contribution they are making.
5. According to paragraph 3, what is the thinking of the Prime Minister of Australia?

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.

   Family life in the United States is changing. Thirty or forty years ago, the wife was called a "housewife". She cleaned, cooked, and cared for the children. The husband earned the money for the family. He was usually out working all day. He came home tired in the evening, so he did not do much housework. And he did not see the children very much, except on weekends.

   These days, however, more and more women work outside the home. They cannot stay with the children all day. They, too, come home tired in the evening. They do not want to spend the evening cooking dinner and cleaning up. They do not have time to clean the house and do the laundry. So who is going to do the housework now? Who is going to take care of the children?

   Many families solve the problem of housework by sharing it. In these families, the husband and wife agree to do different jobs around the house, or they take turns doing each job. For example, the husband always cooks dinner and the wife always does the laundry. Or the wife cooks dinner on some nights and the husband cooks dinner on other nights.

   Then there is a question of the children. In the past, many families got help with child care from grandparents. Now families usually do not live near their relatives. The grandparents often are too far away to help in a regular way. More often, parents have to pay for child care help. The help may be a babysister or a day-care center. The problem with this kind of help is the high cost. It is possible only for couples with jobs that pay well.

   Parents may get another kind of help from the companies they work for. Many companies now let people with children work part-time. That way, parents can spend more time with their children. Some husbands may even stop working for a while to stay with the children. For these men there is a new word: They are called "househusband". In the United States more ans more men are becoming househusband every year.

   These changes in the home mean changes in the family. Fathers can learn to understand their children better, and the children can get to know their fathers better. Husbands and wives may also find changes in their marriage. They, too, may have a better understanding of each other.

The word “they” in paragraph 5 refers to _______________.

Read the following passage and choose the best answer (A, B, C, D):
To really figure out what a CV is, we first have to talk about what CV means. The  letters CV stand (1) ____ curriculum vitae which is Latin for “course of life.” When used in a job seeking context, a CV (also sometimes referred to as just a vita) is a detailed accounting of not only a person’s past history of education, experiences and (2) ____ but also related accomplishments and is generally used when an individual is looking for a job. (3) ____, a CV is a thorough and comprehensive document, detailing not only your education and work history, but also your achievements, awards, any honors you’ve been conferred and any and all of your publications.  A resume, on the other hand, is not so long. Ideally a good solid resume is about one page in length and can be submitted for almost any type of job (4) ____ the market. When you type up a resume, you’re usually just covering your work and educational history. You might include certain professional affiliations and possibly highlight (5) ____ major awards that relate to the job you’re applying for, but it’s usually a concise document. Short and sweet.

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
Who talks more - men or women? Most people believe that women talk more. However, linguist Deborah Tannen, who has the studied the communication style of men and women, says that this is a stereotype. According to Tannen, women are more verbal - talk more - in private situations, where they use conversation as the “glue’ to hold relationships together. But, she says, men talk more in public situations, where they use conversation to exchange information and gain status. Tannen points out that we can see these difference even in children. Little girls often play with one ‘best friend’ and their play includes a lot of conversation. Little boys often play games in groups, their play usually involves more doing than talking. In school, girls are often better at verbal skills, while boys are often better at mathematics.
A recent study at Emory University helps to shed light on the roots of this difference. Researchers studied conversation between children aged 3-6 and their parents. They found evidence that parents talk very differently to their sons than they do to their daughters. The startling conclusion was that parents use more language with their girls. Specifically, when parents talk with their daughters, they use more descriptive language and more details. There is also far more talk about emotions, especially with daughters than with sons.

Which of the following statement is TRUE about the passage?

Read the following passage and choose the best answer (A, B, C, D):
Some cities are located by chance. A wagon breaks down, the driver spends some  time in repairs, finds that he is in a congenial spot, and settles down. Later another person builds a house near his, and later someone adds an inn. Someone else starts selling farm produce there. Soon there is a little market, which grows to a town, and later to a city.  Other places were destined by nature to become cities. London, for example, is on what is called the head of navigation - the point where it becomes too difficult for oceangoing ships to continue upriver, and must transfer their cargoes. As with London, the head of navigation is also the point where the river can be conveniently bridged. In fact, the location of a bridge is often the reason for the birth of a town - as Cambridge or Weybridge in England show. Again, a good harbour will generally lead to a city growing up about it. New York and San Francisco began life as ports, as did Cape Town in South Africa. Some places were created mainly for military purposes, such as Milan, and the host of English cities finishing with - cester, which is derived from castra which means camp in Latin. Chester itself, created to guard the Welsh border, is a very good example. Other such military bases are Manchester, Doncaster, and of course, Newcastle.  A few cites are not created by accident, but by intention. This was the case with Milton Keynes in England, but the most famous examples of such cities are capitals. Brasilia, Canberra and Washington are capitals created in modern times, but even their greatest admirers will admit that they lack a certain character. It is no co-incidence that there are famous pop songs about New York, (“New York, New York”) Chicago (“My kind of Town”) San Francisco (“Going to San Francisco”) and many other US cities, but none about the nation’s capital. On the other hand any Londoner can give you at least three songs about the place.
5. The passage suggests that English cities of military origin ____. 

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Alzheimer's disease impairs a person's ability to recall memories, both distant and as a few hours before. Although there is no yet a cure for the illness, there may be hope for a cure with a protein called nerve growth factor. The protein is produced by nerve cells in the same region of the brain where Alzheimer's occurs. Based on this relationship, scientists from the University of Lund in Sweden and the University of California at San Diego designed an experiment to test whether doses of nerve growth factor could reverse the effects of memory loss caused by Alzheimer's. Using a group of rats with impaired memory, the scientists gave half of the rats doses of nerve growth factor while giving the other half a blood protein as a placebo, thus creating a control group. At the end of the four-week test, the rats given the nerve growth factor performed equally to rats with normal memory abilities. While the experiment do not show that nerve growth factor can stop the general process of deterioration caused by Alzheimer's, they do show potential as a means to slowing the process significantly.
1. With what topic is this passage mainly concerned?