6.eve　　　 7.merry　 8.almost

　 A teacher asked one of her students a lot of questions .But the student couldn't answer a______ of them .Then she wanted to ask some e______ questions .She thought the student could give the r______ answers now .Yet the student couldn't answer even s_____ easy questions .The teacher asked him "Who is the president (总统)of the USA ?" He said nothing .The teacher got more and more a______ and at last she s______ to him ."George Washington(乔治·华盛顿)"When she said this ,the student immediately (立即) s_____ down .He didn't know who was George Washington .He thought the teacher was c_____ one of the other students in his class .

[答案与提示]

　　 Scientists are trying to make 　1 　into good land again .They want to bring

2　 to the desert ,so people can live and grow food . They are learning 　3 　about the deserts . But 　4　 of the earth is becoming desert all the time .Scientists may not be able to change the desert in time .

Why is more and more land becoming　 　5 　? Scientists think that people make deserts .People are doing bad things 　6 　.

Some places on the earth don't get very much 　7　 . But they still don't become deserts .This is because some 　8 　are growing there .Small green plants and grass are very 　9 　to dry places . Plants don't let the hot sun make the earth even driver .Plants don't let the wind blow the dirt (土)away .When a little bit of rain falls ,the plants hold the water . 10 　plants ,the land can become a desert much more easily .

1. A. the woods　　　 B. the forests　　　 C. the deserts　　　 D. the mountains

2. A. sunlight　　　　 B. water　　　　　　 C. air　　　　　　　 D. dirt

3. A. a lot　　　　　 B. a lot of　　　　 C. a number of　　 　D. a great deal of

4. A.　 many and many　 B. much and much　　 C. most and most　　 D. more and more

5. A. desert　　　　　 B. hills　　　　　　 C. seas　　　　　　 D. rivers

6. A. to earth　　　　 B. on earth　　　　 C. to the earth　　 D. on an earth

7. A. air　　　　　　 B. rain　　　　　　 C. wind　　　　　　 D. sunlight

8. A. wild animals　　 B. scientists　　　 C. farmers　　　　　 D. green plants

9. A. interesting　　 B. beautiful　　　　 C. important　　　　 D. difficult

10.A.Without　　　　 B. With　 　　　　　　C. About　　　　　　 D. To

15. I ____ to learn English when I _____ five .

A.have begun …have been　　　　　 B. began…have been

C. have begun …was　　　　　　　　 D. began…was

14._________ do I have to take the medicine ?Every four hours .

　 A. How many hours　　　　　　　　　 B. How often

　 C. How soon　　　　　　　　　　　　 D. How long

13.　 Let's have a short rest under the tree ,________?

A. won't you　　　　　　　　　　　 B. will you

C. shall we　　　　　　　　　　　　 D. can we

12.　 When I was _____ to school ,I saw a very big stone ________ .

A. on the way ;by the way　　　　　 B. in the way ,on the way

C. on the way ,in the way　 　　　　D. all the way ,by the way

11.　 The policeman told the little boy _____ the street when the lights were red .

A. not to run across　　　　　　　 B. don't cross

C. don't to go across　　　　　　　 D. to not cross

10.　 They were busy ______ rice last October .

A.getting ready for harvesting .

B.to get ready to harvest

C.to get ready for harvesting

D.getting ready to harvest