15. Today Miss Li wears a miniskirt, _____is unusual.

　　　　 A. it 　　 B. that C. as 　 D. what

14. He has made another wonderful discovery, _____ great importance to science.

　　　　 A. which I think is of 　　 B. which I think it is of　 C. which I think is　 D. I think which is of

13. You may write to me or telephone me, _____ way will do.

　　　　 A. all 　　　　　　　 B. both 　　　　　　 C. either 　　　　　 D. one

12. When you buy your fast food, you should ____ your turn.

　　　　 A. keep　　 B. wait 　　C. find 　　D make

11. They have produced _____ cotton this year as they did 10 years ago.

　　　　 A. as twice many　 B. twice as much　 　C. as twice much 　D. twice more

10. While watching TV _____.

　　　　 A. the telephone rang　　 　　　　　 B. the telephone was ringing

　　　　 C. the phone was heard ringing　　 D. I heard the phone ringing

9. Only when he had explained to me ____ why he was so anxious.

　　　　 A. did I realize　 B. I realized　 C. I did realize　　 　 D. I could realize

8. He had promised to come to see us, and _____.

　　　　 A. so did he 　　 　B. so he did 　 　C. he keeps his promise　 D. he did

7. Is this calculator ____ you borrowed from Jane?

　　　　 A. one B. which 　　　　　 C. what 　　　　　　 D. the one

6. Now our capital city is quite different from ____ it ____ in the 80s.

　　　　 A. what; used to be　　　 B. that; used to be　　 C. x; was　 D. that; was