48.The need for more wood and more land results in ________.

A. the change of the world climate

B. the disappearance of many plants and animals

C. more desert and less farmland

D. all of the above

47.Which of the following is TRUE according to the passage?

A. Africa and South America are the oceans of trees.

B. Forests are homes for different kinds of animals.

C. Forests are usually several square kilometers large.

D. Different plants can’t be found in the same forest.

46.The passage mainly tells us about _________.

A. the importance of taking care of our plants

B. the result of cutting down the trees

C. the locations (位置) of great forests

45. The best title (题目) for the passage is “______”.

1. Reaching the Top of the Mountain　　

B. Standing at the Top of the Mountain

　Conversations between Father and Son　

　D. How to Get to the Top of the Mountain

C

If you travel by air across the center of Africa or South America, you fly over forests for thousands of kilometers. These great forests are the oceans of trees. They are full of thousands and thousands of different kinds of plants and animals.

However, the world forests are getting smaller all the time. We are cutting down the trees because we need wood, and we need more farmland. Some people say that there will not be any forests like these in 20 or 30 years. What will happen if they disappear?

If we cut down our forests, a lot of plants and animals will disappear from the world. In a lot of places the new farmland will soon look like the old deserts. Crops will not grow there. It will not rain very often, and the weather will get very hot. Perhaps the climate of the world will change. This will be dangerous for everyone in the world. That is why we must take care of forests.

44. We can infer (推断) from the last paragraph that ______.

　A. the writer was very successful in his life.

　B. the writer reached the top of the mountain.

　C. thought the writer was young, he could understand his father.

　D. the writer used to stop half-way when he climbed the mountain.

43. Which of the following is the closest (最接近的) in meaning to the father’s words in the second paragraph?

　 A. You will get all you need at the top of the mountain.

　 B. The sky is always as clear as crystal.

　 C. You can find life is full of nice things.

　 D. Never give up half-way.

42. The word “quit” in the passage means “______”.

　 A. carry on　　 B. put off　　　 C. give up　　　 D. pick up

41. The passage tells us that mountain-climbing was _____for Father and Son.

　 A. hard　 B. enjoyable　　 C. painful　　 D. comfortable

40. An animal or a plant that is going extinct __　　　　　　

A.　　　 no longer exists(存在) in the world　

　B. comes into this world soon

　C. becomes very dangerous　

　D. has fewer and fewer living members

B

Once we climbed a very high mountain. It was so challenging for me because I was only ten years old. During the first few hours of climbing . I enjoyed the flowers and trees, and the birds’ singing, but as time passed, I got a pain in both of my legs. I wanted to quit climbing. In fact, I hated it at that mountain, but my father said to me, “You can always see a beautiful sky at the top of the mountain, but you can’t see it before you reach the top. Only there at the top, can you see all of the nice things, just like in life.”

　　 At that time, I was too young to understand his words. But later after that, I got knew hope and confidence. I found myself standing at the top of the sky, which was as clear as crystal (水晶).

39. A mammoth is a kind of_　 _ that has gone extinct.

　　 A. plant　　　 B. bird　　 C. animal　　 D. tree