201112月英语三级考试最后冲刺试题及答案(第十三套).doc

　　Part II Reading Comprehension (35 minutes) (40%) 　　Directions: There are 4 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center. 　　Passage I 　　Questions 21 to 25 are based on the following passage: 　　Scientists are trying to make the deserts into good land again. They want to bring water to the deserts so that people can live and grow food. Even so, more and more of the earth is becoming desert all the time. 　　Why? Scientists think that people make deserts. People are doing bad things to the earth. Some places on the earth do not get very much rain. Yet, they still do not become deserts. This is because there are some small green plants growing there. Plants help keep water in the earth. Plants do not let the wind blow the dirt away. Without plants, the land can become a desert much more easily. 　　A man decides to make a farm in a very dry place. He digs in the earth and takes away the grass and plants that are already growing on the dry land. 　　He makes a farm. He puts plants in rows. The sun is very hot. It makes the land even drier. When the rain comes, it runs between the rows of plants. It washes the good dirt away. When the wind comes, it blows between the rows of plants. It blows the good dirt away. 　　Soon the land is not good enough for a farm any more. The man lets his animals eat all the plants on it. Now the land does not have any plants on it. The sun and wind dry the land and all of the good dirt away. Now the land is a desert. 　　21. A desert is probably _______. 　　A) grassy 　　B) treeless 　　C) wet 　　D) muddy 　　22. Land is becoming desert because of lack of _______. 　　A) rain 　　B) wind 　　C) people 　　D) plants 　　23. Which of the following is NOT the reason why small green plants are very importan