23. It was evening ________ we reached the little town of Winchester . 　A. that　　　　　　　　　　　　 B. until　　　　　　　　 C. since　　　　　　　　 D. before

22. You should try to get a good night’s sleep　__________　much work you have to do . ( 04 湖北 ) 　A. however　　　　　　　　　 B. no matter　　　　　 C. although　　　　　　 D. whatever

21. Scientists say it may be five or six years _________　it is possible to test this medicine on human patients. ( 04 福建 ) 　

A. since 　　　　　　　 B. after　　　　　　　　 C. before　　　　　　　 D. when

20. _____________ I know the money is safe, I shall not worry about it.　 (03 北京 )

　 A. Even though　　　　 B. Unless　　　　　　　 C. While　　　　　　　 D. As long as

19. He made a mistake, but then he corrected the situation ____________ it got worse.　 (03 北京 )

　 A. until　　　　　　　　　　 B. when　　　　　　　　 C. before　　　　　　　 D. as

18. - Was his father very strict with him when he was at school?

　 - Yes. He has never praised him ____ he became one of the top students in his grade.　 (03 春季)

　 A. after　　　　　　　　　　 B. unless　　　　　　　 C. until　　　　　　　　 D. when

17. - Dad, I’ve finished my assignment.

-Good, and ____________ you play or watch TV, you mustn’t disturb me.　 ( 03上海 )

A. whenever　　　　　 B. whether　　　　　　 C. whatever　　　　　 D. no matter

16. Generally speaking, ________ according to the directions, the drug has no side effect.　 ( 03上海 )

　 A. when taking　　　　　 B. when taken　　　　 C. when to take　　　 D. when to be taken

15. A good storyteller must be able to hold his listeners’ curiosity ____________ he reaches the end of the story.　 ( 03上海 ) 　

A. when　　　　　　　　 B. unless　　　　　　　 C. after　　　　　　　　 D. until

14. - How far apart do they live?

-___________ I know, they live in the same neighbourhood.　 ( 03上海 )

A. As long as　　　　 B. As well as　　　　　 C. As far as　　　　　　 D. As often as