Forests have always been useful and important to man who makes use of them in many ways. Every day trees are serving man everywhere. Trees supply man with fruits and building materials in the form of wood. Without trees it would be impossible to build houses, boats, bridges and so on. Furniture such as desks, chairs and beds is made of wood. Trees can stop man from terrible heat. They're also useful in preventing good and rich top soil from being washed away during heavy rains.

　　If there were no trees, heavy rains would wash away the rich top soil that is so important to plants. The result is that the land will become a desert. There are plenty of desert areas in the world. A long time ago these desert areas used to be very rich areas, but man in the past had no enough knowledge about science of nature, they cut down too many trees in the area where they lived and never planted new ones. By and by the rich top soil was blown and washed away by strong winds and heavy rains. In the end the rich land changed into useless deserts where nothing could grow.

According to the passage, ______.

　　　　A. a long time ago, man didn't know how to make use of wood

　　　　B. trees are not as useful as they were in the past

　　　　C. trees were more found in the past than they are today

　　　　D. people have always found trees useful

　　If there were no trees, ______.

　　　　A. the land would become better　　　　B. heavy rains would be very clean

　　　　C. the rich soil couldn't be kept　　　　 D. there wouldn't be any plants

　From the passage, we know that man must ______.

　　　　A. do nothing to keep the balance（平衡）of nature

　　　　B. take his best to keep the balance of nature

　　　　C. try his best to keep the balance of nature

　　　　D. do his best to stop the balance of nature

_______ we call the First Aid Centre, the doctors _______ by and by.?

What an exciting day it was for Jennifer and Valerie! They　26　　friends since Grade Three and had  27　many of their high school experiences. Now they were driving together to their final high school event. Today was　28　day at Laman High School.　 29　they were close friends, they were different in many ways. Jennifer was a fairly　30　　student while Valerie did just enough to get by and was mainly　31　　in a good social life.

"Isn't it　32　　that we're all finished?" said Valerie. "I'm really looking forward to having a　33　　time this summer."

"　 34　　be nice,"　Jennifer replied. "I'm afraid I'm going to have to work most of the summer to help pay for my college expenses. "

Jennifer's parents had only a small　35　　and she had made up her mind to have a career in which he could　36　　all the things her　37　　could not.

Valerie,　 38　　, came firm a fairly wealthy family. She had little desire to work hard for　　39　　she had always taken for granted.

"I really don't want to go to college for a while," she　40　 . "My uncle　41 a restaurant in the Bahamas and he has　42　　me to spend a year there　43　　a waitress. That should give me plenty of　44　　for the beach. "

"It seems　45　　will really be going different ways now," thought Jennifer.

1.A.has been　　     B. were　C. had been　　　         D. would be

2.A.learned　　　    B. obtained　 C. remembered　　    D. shared

3.A.exam　　　　    B. sports　　   C. graduatioD. working

4.A.If　　　　　    B. Because　　   C. Although　　　 D. When

5.A.diligent　　        B. polite　　 C. active　　　　    D. favorite

6.A.specialized　       B. relievedC. envied　  D. interested

7.A.certain　　　       B. great　　　  C. unfortunate  　　    D. annoying

8.A.nice　　　　    B. high         C. bad　　　　　　  D. happy

9.A.Can　　　　　   B. Shall　　　  C. Must　　　　　   D. Need

10.A.income　　　   B. problem  　  C. family　　　　   D. difference

11.A .afford　　　      B. give　　　   C. support　　  　　    D. send

12.A .teachers　    B. parents　　  C. friends　　　 　 D. relatives

13.A.in fact　　　B. in a way  C. as a result　       D.on the contrary

14.A.what　　　         B. whom　　　   C. that　　　　　   D. these

15.A.admitted　B. complain　    C. proposed　　　   D. screamed

16.A.opens　　  B. runs　　　   C. works　　　　        D. makes

17.A.helped　　B. assured　　   C. invited　　　　      D. promised

18.A.on　　　　　   B. do　　　　   C. like　　　　         D. as

19.A.peace　　　　  B. work　　　   C. energy　　　         D. time

20.A.I　　　　　　  B. we　　　　   C. she　　　　　        D. they

_______ we call the First Aid Centre, the doctors _______ by and by.?

　 A. No sooner; would come 　 B. Soon after; would come

　 C. Shortly; are coming 　   D. Immediately; will come