21. In the terrible dream he found himself on the surface of a strange animal but it ______ to be his own pillow.

A. turned out　 B. turned over　 C. turned down　　　 D. turned off

19. Scientists say they have found a way to produce the human body’s own cancer-killing cells through gene treatment, ______ new hope to cancer sufferers.

A. offering B. showing　　　 C. taking　　 D. making　

20 New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.

A. is used; not to pollute　 B. has used; is not polluted

C. is being used; do not pollute　　 D. has been used; to pollute

18. ---- If it hadn’t been raining so hard, I might have been home much earlier.

　 ---- It’s too bad you _____ it. Nancy _____ here and she _____ to see you.

　 A. didn’t make; is; was　

　 B. won’t make; will be; wants

　 C. didn’t make; was; wanted

　 D. wont’ make; would be; wanted

17. The prices are _____ fast these days. Nobody can get the prices _____.

　 A. going down; to bring down　　　　

　 B. rising; to be bringing down

　 C. raising; bring down

　 D. going up; brought down

16. ---- How does your second-hand car run?

　 ---- It _____ run all right, but it is being repaired.

　 A. has　 B. had　 C. doesn’t　　 D. used to

15. I _____ my son _____ a doctor, but he wasn’t good enough at science.

　 A. hoped; became　　　　　 B. hoped; could become

　 C. had hoped; would become

　 D. had hoped; would have become

14. ---- Tom, did Mr. Li join you in your discussion?

　 ---- No, he _____, but he happened to have fallen ill.

　 A. would like to　　　　 B. will　　　　　

　 C. was to have　　　　　 　　 D. was going to join

13. Good heavens! There you are! We _____ anxious about you, and we _____ you back throughout the night.

　 A. are; expect　　 　 B. were; had expected　　　

　 C. have been; were expecting　　　　　

　 D. are; were expecting

12. ---- You haven’t got the textbook for my chemistry course yet.

　 ---- I know, and we _____ to get it for the last 5 weeks.

　 A. will have been trying　　　 B. have been trying　　

　 C. will be trying 　　 D. had tried

11. ---- Hey. Look where you are going!

　 ---- Oh, I’m terribly sorry ____.　　　　　　

　 A. I’m not noticing　 B. I wasn’t noticing　　　

　 C. I haven’t noticed D. I don’t notice