29. It was very late, _______ the students still went on repairing their desks and chairs.

　　　　 A. and　　　　　　 B. or　　　　　　　 C. so　　　　　　 D. but

28. We bought Mary a present, _______ she didn’t like it.

　　　　 A. and　　　　　　 B. but　　　　　　 C. or　　　　　　 D. so

27. ________ our football team failed in the match, we did our best.

　　　　 A. Though　　　　 B. But　　　　　　 C. Because　　　　 D. As

26. John fell asleep ________ he was listening to the music.

　　　　 A. after　　　　　 B. before　　　　　 C. while　　　　　 D. as soon as

25. He is a scientist, ________ a singer as well.

　　　　 A. but　　　　　　 B. nor　　　　　　 C. or　　　　　　 D. and

24. A lot of new buildings have been put up in our university. It is no longer the same _______ it used to be.

　　　　 A. like what　　　 B. that　　　　　　 C. as　　　　　　 D. what

23. I was about to leave the office _______ the telephone rang.

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

22. Gray didn’t recognize his old classmate ________ he was told her name.

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

21. Stop smoking, _______ you will get better soon.

　　　　 A. and　　　　　 B. or　　　　　　　 C. that　　　　　 D. after

20. I think we should get this computer, _______ it will take up more space.

　　　　 A. but　　　　　 B. although　　　　 C. and　　　　　 D. so