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 北京春季)

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

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

-　　 17. - Dad, I’ve finished my assignment. ( 03上海 )

-　　 Good, and ________you play or watch TV, you mustn’t disturb me.

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

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

13. Americans eat _____ vegetables per person today as they did in 1910. (02上海春季 )

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

12. - Did you remember to give Mary the money you owed her?

　 - Yes, I gave it to her ____________ I saw her.　 ( 01春季 )

　 A. while　　　　　　　　　 B. the moment　　　　　　　 C. suddenly　　　　　 D. once

11. The men will have to wait all day ________ the doctor works faster.( 01春季 )

　 A. if　　　　　　　　　　　　 B. unless　　　　　　　 C. whether　　　　　　 D. that

10. The WTO cannot live up to its name _____ it does not include a country that is home to one fifth of mankind. ( 00 )

　 A. as long as　　　 B. while　　　　　　　　 C. if　　　　　　　　　　　 D. even though

9. Someone called me up in the middle of the night, but they hung up _________ I could answer the phone. ( 00 ) A. as　　 　　　　　　　　　 B. since　　　　　　　　 C. until　　　　　　　　 D. before