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Read the following article and select the best answer. Article: The ozone layer is a thin layer of gas around the earth. It forms a special "blanket" around the planet. This "blanket" protects the earth from dangerous rays produced by the sun. Without the ozone layer, the earth's climate could warm to dangerous levels. This increase in temperature would threaten our survival. Scientists recently have discovered a hole in the ozone layer above the Antarctica. Now there is great concern that this warning has started, endangering all life on the earth. What has destroyed part of the ozone layer? Scientists do not know for sure. They suspect that our popular spray cans have played a part in the damage. Many spray cans contain dangerous gases. These gases might have destroyed the ozone layer fifteen miles above the earth's surface, The chemicals used in refrigerators and air conditioners may contribute to the problem, too. Many scientists believe that the destruction of the ozone layer is a serious problem for people everywhere. Global warming could change weather patterns around the world. Farmers and ranchers could find it more and more difficult to produce enough food for the earth's people. If more of the sun's dangerous rays reached the earth, there also could be an increase in skin cancers. Some skin cancers might cause people to die. Although some scientists do not believe there is a serious danger, obviously no one wants to take any chance on such a possibility. Can scientists repair the hole in the ozone layer? They really don't know the answer to that question. Can people do anything to save the ozone layer that the earth still has? Scientists stress the need to limit the use of spray cans and other items that contain the dangerous gases. This will not be an easy task. People all over the world use these items. Solving the problem certainly will require commitment and cooperation from everyone. Question: The ozone layer exists to _ . - warm the earth to a proper level for life - protect the earth from dangerous sun rays - make all life on the earth in a dangerous situation - prevent human beings from being harmed from the earth
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protect the earth from dangerous sun rays

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Read the following article and select the best answer. Article: Researchers and many scientists are concerned that the earth's climate and atmosphere are becoming warmer than they should be. What scientists do agree on is that the temperature will continue to increase if measures are not taken to reduce pollution and emission from cars and factories. It is widely agreed that oil and coal create greenhouse gases when they are burned to produce heat or power. These emissions include carbon dioxide, which is the cause of most of the global warming problem. The loss of the trees in many areas is making the problem worse, because trees and plants absorb carbon dioxide and release oxygen. The fewer trees that are left standing, the less carbon dioxide can be absorbed. Scientists predict that the sea level will rise, ice caps will melt, and some animals and plants will fail to survive because their habitat will disappear. There may be more deserts and less available farmland because of the dry ground, and there may be more storms and floods in many countries. Some countries, including the UK and the US, are taking steps to prevent the situation from becoming worse. There are programmes to educate citizens and students about the situation and recycling waste is becoming more common. New guidelines are being introduced to try to limit greenhouse gases from being produced by factories and businesses. Using more alternative energy sources is also a good way to prevent global warming. One thing that everyone can do is limit their use of energy every day, and you can do this no matter how old or young you are. Try to limit the unnecessary use of electricity and work to conserve energy every day. Question: What is the best title for the text? - How to Reduce Emissions - What Global Warming Brings - Take Action to Prevent Global Warming - No Emissions, No Warming
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Take Action to Prevent Global Warming

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Read the following article and select the best answer. Article: Frankly, I very much appreciate myself. Yes, I admit I'm in many respects not as good as other people, but I don't think I'm always not good. When I find what I've done or written is okay, I'll remain pleased with myself for quite a few days, and in case I receive praise for it, I'll even become so excited as to add a few words to glorify myself. True, I'm not modest at all. People may call me conceited . But I think otherwise. I also appreciate other people. I appreciate anything good. Isn't it unfair to forget appreciating myself while appreciating others? We Chinese generally tend to be modest, and we take pride in being so. For example, a Chinese will call his own wife zhuojing, meaning "my humble wife", and his own writings zhuozuo, meaning "my poor writings". But if you should call his wife a "rustic woman" or his writings "trash", he would, I'm sure, slap the table in a rage and declare he would make a clean break with you. As a matter of fact, there is probably no difference at all between what is said by him and you respectively. I don't think it's wrong for you to freely praise yourself if you're really worthy of praise. As we know, there is an old Chinese saying disparaging a melon peddler , named Lao Wang, who keeps praising his own goods. Well, why can't he praise his melons if they are really sweet and juicy? Friends, Lao Wang sells melons for a living. How could he carry on business if he, by imitating the affectations of us intellectuals, were to show false modesty about his melons? He would sure enough die of starvation. Self-appreciation is therefore key to professional dedication and enjoyment of work. One will lose confidence in continuing with writing when he pauses to admire his own essays. Needless to say, the same is true of those who make a living with their pen. Question: Which of the following is TRUE according to the passage? - If I find what I've done or written is wrong, I'll appreciate myself. - I never appreciate other people because I think others are foolish. - If you think poorly of your friend's writings, perhaps he'll be angry at you. - Lao Wang will die of starvation because he never praises his melons.
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If you think poorly of your friend's writings, perhaps he'll be angry at you.