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 :
There are many sources of pollution in our modern world. At present, the most (1)___________ sources are acid rain, car exhaust fumes and oil spills. Factory chimneys give out smoke that contains sulphur dioxide and nitrogen oxide. These gases combine with the moisture in the atmosphere to form sulphuric acid and nitric acid. When it rains, these acids dissolve in the rain and (2)___________ it acidic. Acid rain is thought to be the worst pollution problem of all. It has (3)___________ aquatic life by turning many lakes into lifeless bodies of water. Car exhaust fumes contain carbon monoxide and lead which are highly poisonous. In big cities, the exhaust fumes build (4)___________ and pose a health hazard to human beings. Pollution of the sea by oil threatens marine life. Much of the oil comes from ships that clean their fuel tanks while at sea. Pollution of the sea can also be caused by oil spills. An oil spill may occur as a result of accidents (5)____________ oil tankers.

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When people are looking for a great way to (1)_________ themselves of boredom, videos found on the Internet are often the perfect solution. Such websites as YouTube, Dailymotion, and Vimeo have become so popular that they are known to get millions of visits each day. YouTube is known for allowing people to create their own videos and share them with the world. It is (2)________ YouTube that enormous amounts of interest in certain videos can be created. So many people watch them that the interest (3)________ from person to person is almost exponential. Another site that is similar to YouTube is called Vimeo. Although it (4)_________ as a direct competitor to YouTube, Vimeo has more of a concentration on longer videos. However, the (5)_________ is the same in which the service allows users to share their videos with a very wide audience on the Internet.

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Would you mind _______ more clearly, please?

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I _______ home once a week to tell my parents I'm okay.

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Come to me if you ________help.

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An Amazing Invention
Look at your hand, and it might not seem very interesting at first, but it is an amazing tool. In fact, the human hand is as complex and as useful as a high tech machine. This might sound strange to you, but the development of the human hand changed the world. For example, the thumb helped human beings become the smartest and most powerful animals on the Earth. Your thumb is important because it faces your other fingers. This allows you to hold things, like tools. Being able to hold tools allowed our ancient ancestors to build things and become more advanced. It is also possible that when we developed thumbs and started to use tools, our brains developed faster as well. And how about this? Your fingers are the only parts of your body that are moved by a “remote control”. A remote control is the small device that you use to change the channel on your television. Your fingers are controlled by remote because they don’t have any muscles. You control your fingers with the muscles in your palms. The palms are connected to the fingers by tendons. The palms pull the tendons, and move them the same way a string moves a puppet. Every part of the human body is complicated, but the hand is especially complicated. It has a total of 29 bones. There are 34 different muscles that move the fingers and the thumb. Seventeen of those muscles are in the palm, and 18 are in the forearm. The human hand also has 48 nerves and 30 arteries. An artery is like a vein, but it carries blood away from the heart. Human beings are not as strong or as fast as other animals. However, our ancient ancestors were able to rule the world for two reasons.  First, they were intelligent. Second, they had these amazing instruments called hands. There is no other invention like them in the world. 
2. Which statement is true?

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A Tale of Two Cities: Seoul and Dhaka

The city of Seoul, with a population of 10.3 million on 1998, forms part of South Korea’s capital region. As the capital city, Seoul has been at the center of South Korea’s remarkable economic transformation over the last four decades.

In the 1960s, much of South Korea’s industrial growth was focused on greater Seoul, which by 1970 had 52 percent of the country’s industrial workers. The major contributor to this growth was rural-urban migration, which accounted for 50 percent of the country’s urban increase in the 1960s. This very rapid growth of Seoul’s population placed pressure on the city’s infrastructure, leading to marked growth in new settlements, increasing  traffic congestion, and growing air pollution. This led the government to adopt a national decentralization strategy in the 1970s that attempted to divert industry to other areas of the country. In the 1980s, continuing efforts were made to decentralize economic activity.

Dhaka’s population of 6.5 million is crowded into 360 square kilometers, creating one of the highest urban densities in the world. Unlike South Korea, Bangladesh has not experienced rapid economic change, and agriculture remains the major component of GDP and the main resource of employment. While general economic conditions have improved somewhat over the last twenty years, Bangladesh is still a very poor country.

Dhaka’s rate of population growth has declined slightly over the past three decades, but it still remains among the highest in Asia (4.2 percent annually). The continuing growth reflects ongoing migration from rural areas to the Dhaka urban region. Recently, the city’s population has also grown as a result of the expansion of its administrative boundaries, a process that added 1 million people to the city in the 1980s. Dhaka’s growth has not been associated with an expansion of productive employment opportunities in relatively high wage areas. Instead, there has been growing employment in the low productivity, low-income sector, such as petty retailing or rickshaw driving.

We can infer from the passage that the reason of the national decentralization strategy in the 1970s and 1980s in Seoul is that ___________.

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When will you ________ a day off?

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Although only a small percentage of the electromagnetic radiation that is emitted by the Sun is ultraviolet (UV) radiation, the amount that is emitted would be enough to cause severe damage to most forms of life on Earth were it all to reach the surface of the Earth. Fortunately, all of the Sun’s ultraviolet radiation does not reach the Earth because of a layer of oxygen, called the ozone layer encircling the Earth in the stratosphere at an altitude of about 15 miles above the Earth. The ozone layer absorbs much of the Sun’s ultraviolet radiation and prevents it from reaching the Earth. Ozone is a form of oxygen in which each molecule consists of three atoms (O3) instead of the two atoms (O2) usually found in an oxygen molecule. Ozone forms in the stratosphere in a process that is initiated by ultraviolet radiation from the Sun. UV radiation from the Sun splits oxygen molecules with two atoms into free oxygen atoms, and each of these unattached oxygen atoms then joins up with an oxygen molecule to form ozone. UV radiation is also capable of splitting up ozone molecules; thus, ozone is constantly forming, splitting, and reforming in the stratosphere. When UV radiation is absorbed during the process of ozone formation and reformation, it is unable to reach Earth and cause damage there. Recently, however, the ozone layer over parts of the Earth has been diminishing. Chief among the culprits in the case of the disappearing ozone, those that are really responsible, are the chlorofluorocarbons (CFCs). CFCs meander up from Earth into the stratosphere, where they break down and release chlorine. The released chlorine reacts with ozone in the stratosphere to form chlorine monoxide (ClO) and oxygen (O2). The chlorine then becomes free to go through the cycle over and over again. One chlorine atom can, in fact, destroy hundreds of thousands of ozone molecules in this repetitious cycle, and the effects of this destructive process are now becoming evident.
10. The paragraph following the passage most likely discusses: 

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Ocean Currents and the Turning of the Tide
If you take a seat at the beach and look out across the water, you’ll soon notice that oceans have a rhythm of their own. Throughout the course of the day, sea levels will rise and fall, and water will flow through routes and end up in different places. But how does it all work? One force at play is tides, which are the alternating water levels of the ocean. There are two major gravitational forces which cause tides: the sun and the moon. The moon’s force has a tugging effect on oceans which causes them to bulge outwards on opposite sides of the planet. Solar tides operate according to the same principles. However, they are only about 50 percent as strong due to the distance between the sun and the earth. As tides rise and fall, they create tidal currents. The strongest tidal currents occur at the height of both high and low tides. Unlike other currents, they do not flow in a continuous stream. Far from shore, tidal currents don’t have much of an effect. Yet when they pass through narrow area, like harbours and bays, tidal currents can displace plants, animals, and sediment. Although they may certainly shake things up, not all of the damage is negative. Tidal currents can spread fish eggs across long distances to assist fertilization, in addition to transporting key nutrients. Another category of currents is ocean currents. These currents occur near the top of the water, and are mainly powered by the wind. One example of these is coastal currents, which are those beachgoers encounter when going for a swim. One of the strongest and most well-known currents is the Gulf Stream, which brings warm water from the Gulf of Mexico all the way to Western Europe. Meanwhile, Deep Ocean currents are a powerful force in the depths of oceans. The strongest of these has been nicknamed the global conveyor belt, and it moves much slower than surface currents. Although we can’t see it in operation, it’s about 16 times as powerful as all the earth’s rivers put together. As the global conveyor belt pushes water around the planet, it carries nutrition and carbon dioxide to places that truly need them. In the end, although there are several currents working on oceans simultaneously, they each seem to perform a necessary function that creates balance for life in the sea.
4. What can he said about the global conveyor belt?

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Glass is a remarkable substance made from the simplest raw materials. It can be colored or colorless, monochrome or polychrome, transparent, translucent, or opaque. It is lightweight impermeable to liquids, readily cleaned and reused, durable yet fragile, and often very beautiful. Glass can be decorated in multiple ways and its optical properties are exceptional. In all its myriad forms - as table ware, containers, in architecture and design - glass represents a major achievement in the history of technological developments.
Since the Bronze Age about 3,000 B.C., glass has been used for making various kinds of objects. It was first made from a mixture of silica, line and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century. When heated, the mixture becomes soft and malleable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow. Why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.
Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or "freeze" at specific temperatures glass progressively softens as the temperature rises, going through varying stages of malleability until it flows like a thick syrup. Each stage of malleability allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus amenable to a greater number of heat-forming techniques than most other materials.

Why does the author list the characteristics of glass in paragraph 1?

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One of the major problems in the art world is how to distinguish and promote an artist. In effect, a market must be created for an artist to be successful. The practice of signing and numbering individual prints was introduced by James Abbott McNeill Whistler, the nineteenth-century artist best known for the painting of his mother, called "Arrangement in Grey and Black", but known to most of US as "Whistler's Mother". Whistler's brother-in- law, Sir Francis Seymour Haden, a less well-known artist, had speculated that collectors might find prints more attractive if they knew that they were only a limited number of copies produced. By signing the work in pencil, an artist could guarantee and personalize each print. As soon as Whistler and Haden began the practice of signing and numbering their prints, their work began to increase in value. When other artists noticed that the signed prints commanded higher prices, they began copying the procedure. Although most prints are signed on the right-hand side in the margin below the image, the placement of the signature is a matter of personal choice. Indeed, prints have been signed within the image, in any of the margins, or even on the reverse side of the print. Wherever the artist elects to sign it, a signed print is still valued above an unsigned one, even in the same edition.
8. The author mentioned all of the following as reasons why a collector prefers a signed print EXCEPT .

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It is true that digital manufacturing does cut out the middle-man. More and more routine, repetitive assembly tasks will be taken (1).......... by machines. But as certain jobs disappear, new ones open up in other parts of the factory. Germany in many ways exemplifies this trend. Today, German manufacturers (2)........... three times more robots than U.S. companies, but they also still employ more humans. Relative to the size of our economies, German's manufacturing workforce is twice the size of America's.
From its very beginning, the fourth Industrial revolution has never presented manufacturers with an either-or choice - robots or humans. It has always been about combining the talents of (3)........... (4)..........., it is the convergence of artificial and human intelligence that will enable manufacturers to achieve a new era of speed, flexibility, efficiency and connectivity in the 21st century. Machines have the ability to assemble things faster than any human ever could, but humans possess the analytics, domain expertise and valuable knowledge (5).......... to solve problems and optimize factory floor production.

(5)....................

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William Sydney Porter (1862-1910), who wrote under the pseudonym of O. Henry, was born in North Carolina. His only formal education was to attend his Aunt Lina’s school until the age of fifteen, where he developed his lifelong love of books. By 1881 he was a licensed pharmacist. However, within a year, on the recommendation of a medical colleague of his Father’s, Porter moved to La Salle County in Texas for two years herding sheep. During this time, Webster’s Unabridged Dictionary was his constant companion, and Porter gained a knowledge of ranch life that he later incorporated into many of his short stories. He then moved to Austin for three years, and during this time the first recorded use of his pseudonym appeared, allegedly derived from his habit of calling “Oh, Henry” to a family cat. In 1887, Porter married Athol Estes. He worked as a draftsman, then as a bank teller for the First National Bank.

In 1894 Porter founded his own humor weekly, the “Rolling Stone”, a venture that failed within a year, and later wrote a column for the Houston Daily Post. In the meantime, the First National Bank was examined, and the subsequent indictment of 1886 stated that Porter had embezzled funds. Porter then fled to New Orleans, and later to Honduras, leaving his wife and child in Austin. He returned in 1897 because of his wife’s continued ill-health, however she died six months later. Then, in 1898 Porter was found guilty and sentenced to five years imprisonment in Ohio. At the age of thirty five, he entered prison as a defeated man; he had lost his job, his home, his wife, and finally his freedom. He emerged from prison three years later, reborn as O. Henry, the pseudonym he now used to hide his true identity. He wrote at least twelve stories in jail, and after re-gaining his freedom, went to New York City, where he published more than 300 stories and gained fame as America’s favorite short Story writer. Porter married again in 1907, but after months of poor health, he died in New York City at the age of forty-eight in 1910. O. Henry’s stories have been translated all over the world.

The author implies which of the following is true?

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Don’t Handle with Care
People always go shopping for the latest and greatest gadgets. Speed, performance, and the latest functions are always key factors before making a purchase. Yet the most important factor of all, which often isn’t considered, is a product’s durability. After all, if a product breaks easily and can’t be repaired, the buyer will have wasted their investment. In other cases, weakly-designed product can cost someone their life. Thankfully, today’s inventors and engineers coming up with some incredible ways to ensure that many products can survive the most difficult situations. One area where durability is absolutely essential is in designing weaponry. In the industry, lapses in quality can lead to death. Designers of military vehicles have recently made great strides in creating some extra tough bulletproof vehicles. Researchers were inspired by the advances made with a similar technology, bulletproof vests. This equipment, which keeps police officers and soldiers protected from gunfire, has been continually upgraded as time has gone on. In order to get tougher, these vests have got lighter, so officers and soldiers can move more freely while working. Beautiful screens, a fast computer processor, and the latest software are probably the biggest concerns for most people shopping for new smartphones. Yet, since most mobiles will be subject to their fair share of bumps and bruises during their life cycle, durability should also be a major concern. A major breakthrough in recent years was the invention of Gorilla Glass. This technology not only prevents devices from breaking when dropped on hard surfaces, but it also makes them scratch-resistant as well. Gorilla Glass screens are given molten alkaline salt baths that produce a hard, compressed layer at the surface. Before a screen can crack, it will have to penetrate this rugged surface, which takes a large degree of force. Recently, another new technique called electrospinning was developed that could make future products even tougher to break. The process involves applying high voltage to a polymer to create a strand of nanofiber. Products designed with the material will be able to absorb more energy without breaking. Researchers are aiming to lighten up aircraft and potentially decrease the damage planes suffer in crashes. Hopefully, these advances are just the beginning. Although science has come a long way in helping manufacturers to create more durable products, the next century should surely bring some even more incredible improvements.
8. Which of the following can provide the better durability with the technique called electrospinning?

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The/ volcanic eruption/ be/ so destructive/ that/ many lives/ be threatened.

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Hot springs are natural springs which produce warm water. Usually, these springs produce water that is at a temperature above the human body. The water is (1) __________ heated. The water comes from close to the center of the earth. There are hot springs in many places all over the world. Some of these are not so hot and people can bathe in them. However, other hot springs are dangerously hot. If a person tried to (2)___________ a bath, they would be seriously hurt, or they might die. Yangpachen Hot Springs in Tibet are famous example of hot springs. In particular, they are famous (3) _________ they are the highest hot springs in the world. These hot springs are 4,500 meters above sea (4)_______. From these hot springs people can see beautiful views of the Nyainqen Tanggula mountain range. There is a resort there that people can visit. At this resort, there are three hot spring pools that people can use. The natural water in
these pools is cooled down so that people can bathe (5)_______ comfort. The original temperature of the water is 70 degrees Celsius or 158 degrees Fahrenheit

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Most of the time, we avoid strangers. It is one of the first lessons we learn (1)__________  children. But according to Dr. Richard Wiseman, it is a habit we should change. Talking to strangers opens up new possibilities in life. It increases the chances of finding luck and friendship. Choosing which strangers to talk to obviously requires a bit of common (2)___________ and judgement, but Liz Barry and Bill Wetzel from New York were so inspired by the idea that they started the “Talk to Me” project. For three years, they sat at bus stops, on street corners and any other place they could find in New York holding a sign saying ‘Talk to me’. They encountered hostility and (3)__________ sometimes, but in general they were surprised by the kindness they encountered. Many philosophical and religious traditions tell us that happiness can be found by living in the present. Now there is some scientific support (4)___________ this belief. Recent research by Harvard University psychologists found that we spend 46.9 percent of our (5)____________ time daydreaming. And when we daydream, we are less happy, the research found

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Overpopulation, the situation of having large numbers of people with too few resources and too little space, is closely associated with poverty. It can result from high population density, or from low amounts of resources, or from both. Excessively high population densities put stress on available resources. Only a certain number of people can be supported on a given area of land, and that number depends on how much food and other resources the land can provide. In countries where people live primarily by means of simple farming, gardening, herding, hunting, and gathering, even large areas of land can support only small numbers of people because these labor-intensive subsistence activities produce only small amounts of food.
In developed countries such as the United States, Japan, and the countries of Western Europe, overpopulation generally is not considered a major caus of poverty. These countries produce large quantities of food through mechanized farming, which depends on commercial fertilizers, large-scale irrigation, and agricultural machinery. This form of production provides enough food to support the high densities of people in metropolitan areas.
A country’s level of poverty can depend greatly on its mix of population density and agricultural productivity. Bangladesh, for example, has one of the world’s highest population densities, with 1, 147 persons per sq km. A large majority of the people of Bangladesh engage in low – productivity manual farming, which contributes to the country’s extremely high level of poverty. Some of the smalleer countries in Western Europe, such as the Netherlands and Belgium, have high population densities as well. These countries practice mechanized farming and are involved in high-tech industries, however, and there fore have high standards of living.
At the other end of the spectrum, many countries in sub-Saharan Africa have population densities of less than 30 persons per sq km. Many people in these countries practice manual subsistence farming; these countries also have infertile land, and lack the economic resources and technology to boost productivity. As a consequence, these nations are very poor. The United States has both relatively low population density and high agricultural productivity; it is one of the world’s wealthiest nations.
High birth rates contribute to overpopulation in many developing countries. Children are assets to many poor families because they provide labor, usually for farming. Cultural norms in traditionally rural societies commonly sanction the value of large families. Also, the governments of developing countries often provide little or no support, financial or political, for family planning; even people who wish to keep their families small have difficulty doing so. For all these reasons, developing countries tend to have high rates of population growth.
(From “Poverty” by Thomas J. Corbett)

The phrase “that number” in paragraph 1 refers to the number of     .

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Creative students ………. drawings and paintings in the ……….. club.

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Nylon ______________ in the 1930s