Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. 
The annual mortality burden in the UK from exposure to outdoor air pollution is equivalent to around 40,000 deaths. To this can be (1) _______ further impacts from exposure to indoor air pollutants such as radon and second-hand smoke.
The health problems resulting from exposure to air pollution also have a (2) ________ cost to society and business, our health services, and people who suffer from illness and premature death. In the UK, these costs add up to more than £20 billion every year.
Vulnerable people are prisoners of air pollution, having to stay indoors and limit their (3) ________when pollution levels are high. This is not only unjust; it carries a cost to these individuals and the community from missed work and school, from more health problems (4) _________ lack of exercise, and from social isolation.
Taking action will reduce pain, suffering and demands on the National Health Service (NHS), while (5) ____ people back to work, learning, and an active life. The value of these benefits far exceeds the cost of reducing emissions. 

(3)......................

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          The Microscope
One of the most important inventions in the development of science and medicine was the microscope. It was (1) ........... the principle that light could be “refracted” or bent, by a glass lens. It was soon discovered that tiny objects could be magnified (2)......... size when viewed through a glass lens that had been ground and polished in a specific (3) ........... Although the principle was known to the Chinese as early as 1000 A.D, it was not until the 13th and 14th centuries in Europe (4)..........it was put to practical use in the form of eyeglasses.
In Europe the first microscope was invented by brothers Zacharias and Hans Janssen, two Dutch eyeglass-makers, around 1590. They built a “compound” microscope, so called because of its two lenses. The most significant development and use of the microscope during this period, however, belongs to another Dutch optician, Antonie van Leeuwenhoek. Bom in Delft, Holland, he became skilled at (5).......... very sharp and accurate magnifying lenses.
(2)........................

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 34 to 38

Thanks to our modern lifestyle, with more and more time spent sitting down in front of computers than ever before, the (34)______ of overweight people is at a new high. As people frantically search for a solution to this problem, they often try some of the popular fad diets being offered. Many people see fad diets as harmless ways of losing weight, and they are grateful to have them. Unfortunately, not only don‘t fad diets usually (35) ____the trick, they can actually be dangerous for your health.

Although permanent weight loss is the goal, few are able to achieve it. Experts estimate that 95 percent of dieters return to their starting weight, or even gain weight. While the reckless use of fad diets can bring (36)_____ initial results, long-term results are very rare.

(37) _______, people who are fed up with the difficulties of changing their eating habits often turn to fad diets. Rather than being moderate, fad diets involve extreme dietary changes. They advise eating only one type of food, or they prohibit other types of foods entirely. This results in a situation where a person‘s body doesn‘t get all the vitamins and other things (38)____it needs to stay healthy.

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There are many mistakes that people make when writing their resume (CV) or completing a job application. Here are some of the most common and most serious.
The biggest problem is perhaps listing the duties for which you were responsible in a past position: all this tells your potential employers is what you were supposed to do. They do not necessarily know the specific skills you used in executing them, nor do they know what results you achieved - both of which are essential. In short, they won’t know if you were the best, the worst or just average in your position.
The more concrete information you can include, the better. As far as possible, provide measurements of what you accomplished. If any innovations you introduced saved the organization money, how much did they save? If you found a way of increasing productivity, by what percentage did you increase it?
Writing what you are trying to achieve in life - your objective - is a waste of space. It tells the employer what you are interested in. Do you really think that employers care what you want? No, they are interested in what they want! Instead, use that space for a career summary. A good one is brief - three to four sentences long. A good one will make the person reviewing your application want to read further.
Many resumes list ‘hard' job-specific skills, almost to the exclusion of transferable, or ‘soft’, skills. However, your ability to negotiate effectively, for example, can be just as important as your technical skills.
All information you give should be relevant, so carefully consider the job for which you are applying. If you are applying for a job that is somewhat different than your current job, it is up to you to draw a connection for the resume reviewer, so that they will understand how your skills will fit in their organization. The person who reviews your paperwork will not be a mind reader.
If you are modest about the skills you can offer, or the results you have achieved, a resume reader may take what you write literally, and be left with a low opinion of your ability: you need to say exactly how good you are. On the other hand, of course, never stretch the truth or lie.

The word "executing" in paragraph 2 is closest in meaning to     .

Choose the best answer: 
I am in favor of English-speaking contests in schools. Such contests encourage students to practice speaking English in their classes and help them improve their speaking skills. (1)..........., while preparing themselves for the contests, students have a chance to review their lessons thoroughly. Contests among classes provide students (2)............ opportunities to work with team spirit, thus enabling them to learn how to cooperate with other people. (3)............. students may think that their preparations for the speaking contests are time-consuming. However, in my opinion, such preparations are (4)............ spending time on. My classmates and I have found that we speak English better after each contest. In sum, English-speaking contests in schools are useful to students.

1.

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How busy is too busy? For some it means having to miss the occasional long lunch; for others,     it means missing lunch altogether. For a few, it is not being able to take a "sickie" once a month. Then there is a group of people for whom working every evening and weekend is normal, and frantic is the tempo of their lives. For most senior executives, workloads swing between extremely busy  and frenzied. The vice-president of the management consultancy AT Kearney and its head of telecommunications for the Asia-Pacific region, Neil Plumridge, says his work weeks vary from a “manageable” 45 hours to 80 hours, but average 60 hours.
Three warning signs alert Plumridge about his workload: sleep, scheduling and family. He knows he has too much on when he gets less than six hours of sleep for three consecutive nights; when he is constantly having to reschedule appointments; "and the third one is on the family side", says Plumridge, the father of a three-year-old daughter, and expecting a second child in October. "If I happen to miss a birthday or anniversary, I know things are out of control." Being "too busy" is highly subjective. But for any individual, the perception of being too busy over a prolonged period can start showing up as stress: disturbed sleep, and declining mental and physical health. National workers' compensation figures show stress causes the most lost time of any workplace injury. Employees suffering stress are off work an average of 16.6 weeks. The effects of stress are also expensive. Comcare, the Federal Government insurer, reports that in 2003-04, claims for psychological injury accounted for 7% of claims but almost 27% of claim costs. Experts say the key to dealing with stress is not to focus on relief - a game of golf or a massage - but to reassess workloads. Neil Plumridge says he makes it a priority to work out what has to change; that might mean allocating extra resources to a job, allowing more time  or  changing expectations. The decision  may take several days. He also relies on the advice of colleagues, saying his peers coach each other with business problems. "Just a fresh pair of eyes over an issue can help," he says.
Executive stress is not confined to big organizations. Vanessa Stoykov has been running her own advertising and public relations business for seven years, specializing in work for financial and professional services firms, Evolution Media has grown so fast that it debuted on the BRW Fast 100 list of fastest-growing small enterprises last year - just after Stoykov had her first child. Stoykov thrives   on the mental stimulation of running her own business. "Like everyone, I have the occasional day when I think my head's going to blow off," she says. Because of the growth phase the business is in, Stoykov has to concentrate on short-term stress relief - weekends in the mountains, the occasional "mental health" day -rather than delegating more work, She says:  “We're hiring more people, but  you need to train them, teach them about the culture and the clients, so  it's actually more work  rather than less.”a

The word "consecutive" in paragraph 2  mostly means    _.

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Expanding the planet's protected natural areas to safeguard vanishing forests and other ecosystems, and the species they protect, is unlikely to be effective on its own as human encroachment into reserves grows, scientists warned Tuesday. A study by Cambridge University researchers, which looked at thousands of conservation areas in more than 150 countries, found that, on average, protected designation is not reducing human encroachment in vulnerable areas. Both chronic underfunding of efforts to protect the land, and a lack of engagement with local communities that live there are hurting conservation efforts, they found.
Creating protected areas is "a type of intervention that we know can work, we know is absolutely essential for conserving biodiversity, at a time in this world's history where it has never been under higher pressure," said lead author Jonas Geldmann. "But despite that we are seeing that some of our protected areas are not managing to mitigate or stop that increasing pressure," said Geldmann, of the University of Cambridge Conservation Research Institute.
One-sixth of the globe now falls within protected areas, the study noted. Those include national parks, nature reserves and wilderness areas, according to the International Union for Conservation of Nature's World Database on Protected Areas. Such protected areas are vital for preserving diverse ecosystems, and helping to curb climate change by conserving carbon-sequestering forests and other vegetation. The United Nations Environment Program estimates protected areas hold 15% of the carbon stored on land.
"Protected areas are one of the most important things that we can do to stem the loss of biodiversity and to help solve the climate crisis," said Andrew Wetzler, managing director of the U.S.-based Natural Resources Defense Council's nature program. "The destruction of natural habitat is the single biggest driver of extinction."

The word “it” in paragraph 2 is closest in meaning to ______.

Read the following passage and choose the best answer for each blank.

After your letter of application and resume, the interview is your best opportunity to (26) _____ the employer - regardless of your background and experience. To do this, use every possible strategy to develop (27) _____ interviewing skills. The best way is to prepare a selective presentation of your background, thoughtful answers to potential interview questions, well-researched questions about the organization, and an effective strategy to introduce yourself. You should also consider your career goals and what the available job offers (28) _____ you can discuss both of these topics with employers. Interviewing is a skill that improves and (29) _____ easier with practice. It is to your advantage to carefully research the job and the organization.                There are many (30) _____ to do this. You can ask for printed materials from the employer, such as annual reports and job descriptions. This is an entirely (31) _____ request, so do not hesitate to make it. Use your library and career center resources. Ask colleagues, friends, and faculty about the organization, and about any personal contacts at the organization they might have. Look at the organization's home page. Knowing about the job will help you prepare a (32) _____ of your qualifications so that you can show, point by point, why you are the best (33) _____. Prepare a clear answer to each of the questions in the interview questions section. Practice answering questions with a friend, or (34) _____ front of a mirror. Ask your friend to give you constructive criticism on your speaking style, mannerisms, and gestures. As you practice, avoid colloquialisms, such as "like" and "you know”. It is (35) _____ to prepare yourself for talking with complete strangers.

(32) _____

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The day after Thanksgiving is the start of the holiday shopping season. Thanksgiving is always on a Thursday, so the day after is a Friday. This day has come to be known as Black Friday. It has been the busiest shopping day of the year since 2005.
Most stores offer great deals on Black Friday. They open their doors in the wee hours of the morning. They try to attract shoppers with big discounts. Some items like TVs are much cheaper than usual. Stores may even lose money on these items. They hope that shoppers will buy gifts for other people while they are in the store.Black Friday is a great time to get good deals. The problem is that there are not enough low-priced items to go around. Each store may only have a few. These items are in high demand. People stand in long lines to get such great deals. They may line up hours before a store opens. They may be hoping to get a low price on a TV or laptop, but not everyone who wants one will get one. Some people leave disappointed. The situation can be tense. Some Black Friday events have been Violent. Large, eager crowds have trampled workers. Fights have broken out or people have been cutting in line. People have shot one another over parking spots. But most Black Friday events are safe and fun. Still, if you plan on going, expect large crowds and a bit of shoving.

The word "trampled" in paragraph 3 mostly means      

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The first thing to do when you have a trip abroad is to check that your passport is valid. Holders of out–of–date passports are not allowed to travel overseas. Then you can prepare for your trip. If you don't know the language, you can have all kinds of problems communicating with local people. Buying a pocket dictionary can make a difference. You'll be able to order food, buy things in shops and ask for directions. It's worth getting one. Also there's nothing worse than arriving at your destination to find there are no hotels available. The obvious way to avoid this is to book in advance. This can save you money too. Another frustrating thing that can happen is to go somewhere and not know about important sightseeing places. Get a guide book before you leave and make the most of your trip. It's a must.
Then, when you are ready to pack your clothes, make sure they are the right kind. It's no good packing sweaters and coats for a hot country or T–shirts and shorts for a cold one. Check the local climate before you leave.
Also, be careful how much you pack in your bags. It's easy to take too many clothes and then not have enough space for souvenirs. But make sure you pack essentials. What about money? Well, it's a good idea to take some local currency with you but not too much. There are conveniently located cash machines (ATMs) in most big cities, and it's usually cheaper to use them than change your cash in banks. Then you'll have more money to spend. When you are at your destination, other travellers often have great information they are happy to share. Find out what they have to say. It could enhance your travelling experience.

What is the passage mainly about?

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A leading question among anthropologists is: what exactly led to the development of human cities? Basically, modern humans have existed on earth for over 100,000 years. Yet it is only in the last 8,000 years that they have begun to gather in significant numbers and form cities. Prior to that period, humans existed in small family or tribal groups, generally consisting of fewer than 100 individuals. What, then, led humans to make the dramatic shift from living in small groups to living in large, organized cities? It seems that the development of cities required a particular set of circumstances.
First, it required a minimum population density. For much of their early history, humans existed only in small numbers. This is due to the fact that early humans relied on hunting and gathering wild foods for their survival. Even the most fertile land would only support a relatively small number of predators, so it was not until humans began to practice agriculture that they were able to gather in large enough numbers to form cities.
Furthermore, the development of a city could only be possible if a large number of people shared a common language, culture and religion. Without such unifying factors, a cooperative, peaceful existence among large numbers of people would have been impossible.
Finally, it seems that early humans needed to be faced with a large problem, which one small group of individuals could not solve on its own. Only when large-scale cooperation was needed to overcome a problem would humans come together to form cities.

What is the passage mainly about?

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There are many theories about the beginning of drama in ancient Greece. The one most widely accepted today is based on the assumption that drama evolved from ritual. The argument for this view goes as follows. In the beginning, human beings viewed the natural forces of the world, even the seasonal changes, as unpredictable, and they sought, through various means, to control these unknown and feared powers. Those measures which appeared to bring the desired results were then retained and repeated until they hardened into fixed rituals. Eventually stories arose which explained or veiled the mysteries of the rites. As time passed some rituals were abandoned, but the stories, later called myths, persisted and provided material for art and drama.
Those who believed that drama evolved out of ritual also argue that those rites contained the seed of theater because music, dance, masks, and costumes were almost always used. Furthermore, a suitable site hard to be provided for the performances, and when the entire community did not participate, a clear division was usually made between the "acting area" and the "auditorium". In addition, there were performers, and since considerable importance was attached to avoiding mistakes in the enactment of rites, religious leaders usually assumed that task. Wearing masks and costumes, they often impersonated other people, animals, or supernatural beings, and mimed the desired effect- success in hunt or battle, the coming rain, the revival of the Sun as an actor might. Eventually such dramatic representations were separated from religious activities.
Another theory traces the theater's origin from the human interest in storytelling. According to this view, tales (about the hunt, war or other feats) are gradually elaborated, at first through the use of impersonation, action, and dialogue by a narrator and then through the assumption of each of the roles by a different person. A closely related theory traces theater to those dances that are primarily rhythmical  and gymnastic or that are imitation of animal movements and sounds.

Which of the following is NOT mentioned as a common element of theater and ritual?

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The majority of medium and large companies pay higher wage rates to men than to women, according to the latest government figures. The disparity, known as the gender pay gap, reflects the different average hourly salaries earned by men and women. The government data showed 74% of firms pay higher rates to their male staff. just 15% of businesses with more than 250 employees pay more to women. As many as 11% of firms said there is no difference between the rates paid to either gender.
Unlike pay inequality - which compares the wages of men and women doing the same job - a gender pay difference at a company is not illegal, but could possibly reflect discrimination. The average gender pay gap across all medium and large-sized firms is now 8.2%, as measured by median pay. in other words, men typically earn over 8% more per hour than women. Among those with the largest gender pay gap are airlines such as Tui and Easyjet, and banks including Virgin Money, the Clydesdale and TSB. Easyjet has said its pay gap of 45.5% is down to the fact that most of its pilots are male, while most of its more modestly paid cabin crew are female. Tui Airways - where men earn 47% more than 214women - has the same issue. Many banks also appear to have a gender bias on salaries. The Bank of England's wage rate for men is 24% higher than for its female employees.
By law, all firms with more than 250 staff must report their gender pay gap to the government by 4 April this year. So far only 1,047 firms have complied, leaving another 8,000 to go. Carolyn Fairbairn, director general of the CBI, denied companies were dragging their feet in reporting the data. "I don't see a reluctance," she told the Today programme. "I think this is genuinely quite difficult data to find, it is often sitting on different systems and firms are working very hard towards that deadline.

The phrase "dragging their feet" in paragraph 3 means     .

Choose the best answer:
Many young people choose to spend a year or two of their lives while they are still (1)______ living in a foreign country and working as a volunteer. Working as a volunteer means that you cannot only help others, but also develop a (2)______understanding of the world and yourself.

You must have a university degree and (3)______at least one year‟s experience before you can (4)______ . Suitable applicants are invited to attend a series of interviews and are then sent on a training programme. Applicants are usually offered a post (5)______ months and can be sent anywhere from the Sahara to Siberia.

The advantages of being a volunteer far (6)______ the disadvantages. Being a volunteer can enable you to get (7)______ experience that you would otherwise not have had. It can help you move up the career ladder faster. You will make (8)______friends and return with an appreciation of another culture and language.

However, volunteering is not for everyone. It can be difficult being (9)______ from friends and family. Living on a (10)______ allowance is challenging. But, if you do choose to go, you will return a stronger and wiser person.
9.

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Charles Lindbergh was born in Detroit, Michigan, in 1902 but was raised on a farm in Minnesota, where his father was elected to the U.S. Congress in 1907. From then on, he spent his boyhood alternately in Washington, D.C. Detroit, and Little Falls, Minnesota. Because Lindbergh exhibited exceptional mechanical talent, in 1921 he was admitted to the University of Wisconsing to study engineering. However, the young man was seeking more challenging endeavors, and two years later he became a stunt pilot who performed feats at county fairs and public assemblies. This unusual and dangerous undertaking paid off handsomely in the sense that it allowed him to gain a diverse and well–rounded experience in aeronautics. He particularly delighted in what he called “wing–walking” and parachute jumping.
After a year of training as a military cadet, Lindbergh completed his program at the Brooks and Kelly airfields at the top of his class and earned the rank of captain.
Robertson Aircraft Corporation of St. Louis, Missouri, offered him employment as a mail pilot to run the routes between St. Louis and Chicago, and Lindbergh retained his position with the company until 1927. During this period, he set out to win the Raymond B. Orteig prize of $25,000 to be awarded to the first pilot to fly nonstop from New York to Paris. This ambition would irreversibly change his life and accord him a prominent place in the history of aviation.
Embarking on the greatest adventure of his time, Lindbergh left Roosevelt Field at 7:52 A.M. on May 20, 1927, and landed at Le Bourget Field at 5:24 P.M. the next day. Fearing that he would be unknown when he arrived, Lindbergh carried letters of introduction to dignitaries in Paris, but when his plane came to a stop, he was overwhelmed by tremendous welcoming crowds. He was decorated in France, Great Britain, and Belgium, and President Coolidge sent a specially designated cruiser, the Memphis, to bring him back, His accomplishments in aeronautics brought him more medals and awards than had ever been received by any other person in private life.

ccording to the passage, Lindbergh did not complete his degree because he

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Women often complain that the men in their lives are not romantic enough. But men sometimes have trouble expressing their feelings, often resorting to cheesy Hallmark cards or pricey bejeweled baubles to do the job for them. But there is a far better way to be romantic and it doesn't involve spending a fortune or even opening your mouth.
In the days before courting consisted of  hanging out and getting drinks, courting was a  formal and dignified endeavor. Symbols were used to express feelings and thoughts deemed too special for mere words. During the Victorian Era, a whole romantic language developed around the giving and receiving of flowers. Everything from the type and size of the flower to  the  way  it  was held or presented conveyed layers of meaning and communicated a gentleman's feelings and intentions. Each bouquet contained a  secret message for a lady to eagerly interpret   and endlessly dissect.
These days giving flowers has become a somewhat ho-hum cliché. Resurrecting this Victorian tradition will infuse the gesture with new life and romance and bring back some of the subtly, mystery, and fun of courtship. Your lady will swoon that you put far more thought into  your selection of flowers than grabbing a bouquet out of the case at Wal-Mart. You'll come off as a real gentleman and a hopeless romantic. It can become an amazing tradition you'll both enjoy. Seriously, women eat this stuff up.
Of course, even women nowadays have forgotten the meanings of flowers. So  buy your lady a flower dictionary. And keep a copy for yourself (it's important that you both use the same reference, as the meanings were never set in stone and can sometimes vary from book to book).  Then, each time you present her with a bouquet, she can search the volume to find what secret messages you have embedded in the flowers.

The word "dignified" in paragraph 2  mostly means    _.

In many ways, the increasingly rapid pace of climate change is a direct result of the growth of the human population. In the last 100 years, the world population has more than tripled, from just under 2 billion at the beginning of the century to nearly 7 billion today. In addition, the average person uses more energy and natural resources than the average person one hundred years ago, meaning that the rates of consumption are actually much higher than just the increase in population would imply. For example, it took the world 125 years to use the first one trillion barrels of oil. The next trillion barrels will be used in less than 30 years, which is almost 5 times as fast, not three.
All of these activities: food production, energy usage, and the use of natural resources, contribute to climate change in some way. The greater amounts of oil and other fuels burned to create energy release chemicals which add to global warming. In order to produce more food, farmers cut down trees to gain more land for their fields. In addition, we cut down trees to build the houses needed for a larger population. Those trees are an essential part of controlling global warming; others are too numerous to mention.
In addition to a growing population, the world also has a population that desires a higher standard of living than in the past, and a higher standard of living requires the use of even more natural resources. A look at one country will provide a clear example of this fact. China is the world’s most populous nation, with 1.3 billion people. Currently, the standard of living for most of those people is far below that of people in first world nations. Therefore, the average Chinese citizen uses far fewer natural resources and less energy than the average citizen of the US or Japan. But China is growing in power, and more of its citizens are beginning to expect a first world lifestyle. If every Chinese person attains a first world lifestyle, the amount of energy and natural resources needed in the world will double, even if the standard of living in every other nation on Earth remains the same as it is today.

According to the passage, how does the standard of living affect global warming?

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In today’s fast-paced industry, learning will most likely involve seeking new skills in ways that challenge the norm. But thankfully, there is a promise for such lifelong learning online - the promise that will save your time and money while helping you earn more of both.
Provided you have access to a decent computer and the Internet, the barrier to getting started is probably lower than it ever has been. And with those things in place, it is a matter of finding the content you wish to learn. So, to help others who may be looking to maximize their own learning efforts, I have listed some quick tips below.
First, set achievable goals. When you start learning, it is a good idea to set goals about what you want to learn or what you might do with your newly acquired knowledge. It might be landing that new job, building a tangible product, or impressing your current management. The goals may vary in size and complexity, but do revisit these goals throughout your learning process. Within a couple weeks, ask yourself: “Am I getting closer to my goal?” or “Am I learning the skills necessary to reach my goals?”. If you are not, then you may need to look elsewhere.
Second, learn with others. By yourself, learning anything has a high propensity to become frustrating. Try teaming up with friends or colleagues. They can often be your best resource for maintaining motivation while you learn.
Third, make it a habit. Online habits often include scrolling through social media or watching videos on YouTube. If you have the downtime for such activities, then you could spend that downtime learning something. And why not learn something? If you do, then you will have plenty more to talk about on social media anyways. So, make learning your new online habit by making a commitment to learn something new each day.

According to the passage, what is the first step of learning online?

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Since the early eighties, we have been only too aware of the devastating effects of large-scale environmental pollution. Such pollution is generally the result of poor government planning in many developing nations or the shortsighted, selfish policies of the already industrialized countries, which encourage a minority of the world’s population to squander the majority of its natural resources.
While events such as the deforestation of the Amazon jungle or the nuclear disaster in Chernobyl continue to receive high media exposure, as do acts of environmental sabotage, it must be remembered that not all pollution is on this grand scale. A large proportion of the world's pollution has its source much closer to home. The recent spillage of crude oil from an oil tanker accidentally discharging its cargo straight into Sydney not only caused serious damage to the harbor foreshores but also created severely toxic fumes which hung over the suburbs for days and left the angry residents wondering how such a disaster could have been allowed to happen.
Avoiding pollution can be a fulltime job. Try not to inhale traffic fumes; keep away from Chemical plants and building-sites; wear a mask when cycling. It is enough to make you want to stay at home. But that, according to a growing body of scientific evidence, would also be a bad idea. Research shows that levels of pollutants such as hazardous gases, particulate matter and other chemical 'nasties’ are usually higher indoors than out, even in the most polluted cities. Since the average American spends 18 hours indoors for every hour outside, it looks as though many environmentalists may be attacking the wrong target.

Which statement about Sydney harbor is probably TRUE according to the passage?

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Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.
Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.
In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.
Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.

The word “fuel” is similar in meaning 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:
Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.
Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.
In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.
Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.

The phrase “this process” refers to the process of     .