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:
An air pollutnt is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled – a far cry from the extensive list of harmful subtances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.
Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and notrigen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature’s output of these compounds dwarfs that resulting from human activities.
However, human production usually occurs in a localized area, such as as city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a subtance to be a pollutant; in fact, the numerial value tells us little until we know how much of an increase this represents over ther concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm.

According to the passage, human-generated air pollution in localized regions

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We have many well__________teachers here.

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Clean and Popular
Wind power is a very clean source of energy. This is how wind power works. Wind makes windmills spin. When the windmills spin, they make electricity. Then we can use the electricity. Many people think that wind power is new, but that is not true. For thousands of years, people have used wind to sail boats and move water. We still do those things today, but these days we mostly use wind power to make electricity. Wind power is a very popular source of energy. Most people think that should use it more and more. First of all, it is clean. Windmills don’t pollute the environment at all. Second, we can use wind power forever. After all, we will always have wind. In addition, wind power is cheap, and it is getting even cheaper. A lot of people don’t understand wind power very well. They believe that there are problems with wind power, but many of those problems are not real. For example, some people say that windmills are dangerous for birds. That used to be true, but it isn’t true anymore. Old windmills killed birds because they spun very fast. New windmills spin slowly, and they aren’t dangerous for birds. However, there are real problems with windmills. One problem is that many people think windmills are very ugly. This is a problem for some people, because windmills are often in very pretty areas. Besides, wind doesn’t blow all the time, so we can’t use wind power all year round. Finally, windmills are noisy. Wind power is becoming more and more common. Right now, more than 80 countries use wind power. About 2.5 percent of the world’s power comes from the wind. For some countries, that number is a lot higher. Wind power gives Denmark more than 25 percent of its electricity.
7. What does the passage say about wind power?

Alice opened the door and found that it ____ to a small passage.

(488)_______

Find the word which has a different sound in the part underlined.
 

To help reduce ---143---, the officers have voted to change the company's travel policy. The revised policy will be ---144--- on June 15. From that point forward, employees traveling within the country will be required to submit their travel requests to the accounting office no later than three weeks before the date of departure. ---145---.---146--- exceptions to this policy will be decided on a case-by-case basis and must first be approved by the individual employee's supervisor.

145.................

Rewrite sentences without changing the meaning
He prefers siting at home to playing outside.

Find the word which has a different sound in the part underlined

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He had the telephone installed in his car_________ his secretary to be able to contact him wherever necessary.

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The Wonders of Wetlands
If you’re searching for scenic places or areas, visiting wetlands probably won’t be high on your list. Wetlands are areas of land that are often saturated with water and they are quite an eyesore. Although they might not look very pretty, they play an important part in keeping the environment clean and suitable for plant and animal life. With the exception of Antarctica, wetlands occur naturally on every continent. There are many different types of wetlands on the Earth, including bogs, swamps, and marshes. Along with rainforests, they are among the most diverse places on the Earth. In addition to naturally-occurring wetlands, humans are creating artificial ones for a number of purposes related to water management. One of the main benefits of wetlands is that they can prevent floods. They do so by storing water temporarily and then slowly releasing it over time. Wetlands operate similarly to a sponge. When it rains heavily and water levels rise, they absorb the excess water. This prevents runoff from entering streams and keeping them from overflowing. Then, when water levels become low in the future, they will release it. In many cases, wetlands offer a much more affordable solutions than dams. However, it’s important to note that wetlands, like dams, don’t eliminate all dangers from flooding. In cases of extremely heavy rainfall, wetlands can fill up and any additional water will start to run off. Wetlands can also play a part in water purification. Agricultural practices, urban runoff, and sewage waste are a major cause of water pollution. Wetlands contain plants and organisms that can reduce this pollution by filtering out unwanted substances such as chemicals, and decomposing matter, as well as sediment. Wetlands have additional benefits for the environment as well. They can help to feed nearby fish populations by releasing vegetative matter to rivers. Also, many amphibians use wetlands as breeding grounds because it provides places for foraging and the shallow water they require for reproduction. Some birds also use wetlands for migration, as they can settle in trees and then raid the wetland’s waters for fish when they’re hungry. Although wetlands may not look pretty, it’s clear that they are capable of doing the dirty work required to keep our planet clean and ensure that the circle of life remains unbroken.
5. All of the following are benefits of wetlands EXCEPT that __________

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Sam is ....... responsible than Tom.

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He is smartly ........................ when he comes to an interview.

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
The story of gold is an adventure involving kings, queens, pirates, explores, conquerors, and the native peoples they conquered. Throughout history, gold had (1)_____a magic spell over those it touch. Gold is beautiful and rare; a soft shiny metal that can be moulded into many (2)_____.It has been used for money, jewellery, and to decorate special buildings such as palaces and places of worship. (3)_____the precious metal was discovered, prospectors rushed to mine it, starting new cities and countries as they went. Gold and the people who love it have helped shape the world we live in today. Gold is one of many elements, or substances that cannot be changed by normal chemical (4)_____, that are found in the Earth’s crust. Gold has a warm, sunny colour and (5)_____it does not react (6)_____air, water, and most chemicals, its shine never fades. In its natural (7) _____, gold is soft and easily shaped. When heated to 1,062 Celsius it melts and can be poured(8)_____ moulds to form coins, gold bars, and other objects. Stories have been told, movies (9)_____and legends born about the (10)_____of the world’s great gold deposits. It is a saga of dreams, greed, ambition and exploration

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 :
Tornadoes are known to have higher winds than tropical cyclones, (1)_________ tornadoes are much smaller. As a (2)_________, a tropical cyclone can be hundreds of kilometres wide, with destruction occurring in different degrees depending on which part of the cyclone hits the land. In contrast, tornadoes are usually less than a few hundred metres wide. These storms are (3)_________ destructive in the smaller areas in which they hit, but they are also short-lived. Tropical cyclones develop in areas where the seawater is warm and there is instability in the atmosphere. (4)_________ as tropical depressions, they begin to gather strength. As they are developing, they begin to rotate, with the differences in humidity and air temperature (5)_________ them until sufficient wind speeds are reached to be classified as a tropical cyclone

He is a _____ boy. He is often kind and helpful to every classmate.

(191)____

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I have never seen such a beautiful girl before. → She is

Choose the underlined words or phrases that are not correct in standard written English.
 I have broken my pencil. May I borrow one of your?

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:
First used in the 1950s, shipping containers are, in many (1)__________, the symbol of our time. They have helped globalization come in being. Before shipping containers, goods were loaded and unloaded by (2)__________. Each package had to be carried onto the ship, tied down with ropes and then untied and carried out at the other end. (3)___________ unloading a single ship could take 20 men a week, making goods from abroad very expensive. Nowadays, three people operating three cranes can unload a ship in about ten hours. The largest modern ships are four football pitches long and can carry almost 15,000 containers. This has made shipping costs low, which has (4)___________ in cheaper goods all over the world and has affected all our lives dramatically. So next time you buy a T-shirt, a book, or an electronic gadget which was made in another country, remember that it is only (5)__________       because of those big metal boxes

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 :
Do you quickly pull up any piece of information you need by looking (1)___________ on the Internet? If you do, you might be unfortunately making yourself less intelligent. Instead of having to understand basic bits of information, you have come to (2)___________ on the Internet for all of the things that you want to know. While this may be an easy solution and great convenience to some problems in everyday life, it can never be a solution when a person finds himself or herself in a situation where there is no (3)__________ to the Internet. In the past, one thing that was considered a very important part of (4)__________ either in a car or on foot was the ability to read a map. Today, people instead pull up maps on their smartphones and, using the GPS technology that the phones offer, instantly know where they are on the map. Then, they can simply (5)__________ where they want to go, and they will be instructed how to get there. They can do this in a city, and they can also often do this when they go off onto trails in forests.

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Nam will probably be there.