Read the article and select the best answer. Article: Snow falls in the Earth's extreme North and South throughout the year. However, the heaviest snowfalls have been reported in the mountains of other areas during winter. Snow is even known to fall near the Equator ,but only on the highest mountains. Snow contains much less water than rain, but much of the water the world uses comes from snow. Melting snow provides water for rivers, electric power stations and agricultural crops. In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies. Snowfall helps to protect plants and some wild animals from winter weather. Fresh snow is made largely of air trapped among the snow crystals . Because the air has trouble moving, the movement of heat is limited. Snow also influences the movement of sound waves. The surface of the snow takes in, or absorbs, sound waves. As snow grows older or if there have been strong winds, it can become hard and flat. Then, the snow,s surface will help to send back sound waves. Snow may be beautiful, but it can be deadly. It is responsible for the deaths of hundreds of people. Many people die in traffic accidents on roads covered with snow and ice or from being seriously stuck in the winter storm. Others die from heart attacks caused by too much physical activity out in the cold. People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of snowstorms. People should stop driving and stay at home until the storm has passed. People living in these areas should carry emergency supplies in their vehicle. These include food,emergency medical supplies,and extra clothing to stay warm and dry. Question: Mountain snowfall _ . Options: A: is heavier than that in the South and the North Poles B: has never occurred near the Equator of the earth C: brings less of the water the world uses than rain does D: provides up to seventy--five percent of water supplies worldwide
A

Read the article and select the best answer. Article: To master a language one must be able to speak and understand the spoken language as well as to read and write.Lenin and his wife translated a long English book into Russian but when they went to England in 1902, English people couldn't understand a word Lenin and his wife said, and Lenin and his wife couldn't understand what was said to them.This shows the importance of spoken language. Speaking, of course can't go without listening.If you want to pronounce a word correctly, first you must hear it correctly.The sounds of Chinese and English languages are not exactly the same.If you don't listen carefully, you'll find it difficult or even impossible to understand the native speakers. Well, what about writing? Like speaking, it's to exchange ideas.People usually use shorter words and shorter sentences in their writing. The important thing is to make your idea clear in your mind and then to write it in a clear lively language. Chinese students read too slowly.If you read fast, you understand better.If you read too slowly by the time you have reached to the end of a page you have forgotten what the beginning is about.When you meet with new words don't look them up in the dictionary.Guess the meaning to form the context. You may not guess quite correctly the first time but as new words appear again and again in different context their meaning will become clearer and clearer. If you look up every word you'll never finish a book. Students of a foreign language need a particular knowledge, the knowledge of the life, history and geography of the people whose language they're studying. They should study those subjects in the foreign language not only in translation.In this way one can kill two birds with one stone: learn a foreign language and get some knowledge of the foreign country at the same time. Question: In England Lenin _ . Options: A: could be understood by Englishmen B: could understand Englishmen C: and Englishmen couldn't understand each other D: and Englishmen could understand each other
C

Read the article and select the best answer. Article: When we can see well, we do not think about our eyes often. It is only when we can notsee perfectly that we come to see how important our eyes are. People who are nearsighted can only see things that are very close to their eyes. Many people who do a lot of close work, such as writing and reading, become nearsighted. Then they have to wear glasses in order to see distant things clearly. People who are farsighted face just the opposite problem. They can see things that are far away, but they have difficulty reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses too. Other people do not see clearly because their eyes are not exactly the right shape. This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts . Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them. When night falls, colors become fainter to the eyes and finally disappear. After your eyes have grown used to the dark, you can see better if you use the side of your eyes rather than the centers. Sometimes, after dark, you see a small thing to one side of you, which seems to disappear if you turn your head in its direction. This is because when you turn your head, you are looking at the thing too directly. Men on guard duty sometimes think they see something moving to one side of them. When they turn to look straight at it, they can not see it any more, and they believe they were mistaken. However, this mistake happens because the center of the eye, which is very sensitive in daylight, is not as sensitive as the sides of the eye after dark. Question: To see a small thing at night, it is better to look _ . Options: A: with wide open eyes B: with half shut or narrowed eyes C: straight at it D: in a slightly different direction
D