32. --Doesn’t she often ask you for help?

　 --No, only _____.

　 A. at all time　　　 B. at one time　　 C. at a time　　　 D. at times

31.When they found that the moonstone was missing, the detectives Caff was ______ to investigate it.

　 A. called off　　 B. called on　 　　　C. called in　　　　 D. called up

30. I have worked as a member of the school volleyball team for 3 years, _____ we won two tournaments.

　 A. during that time　　　　　　　　　　　　 B. during which time

　 C. of that　　　　　　　　　　　　　　　　 D. of which

29. –It’s a long time _____ I saw you last.

　 --Yes, and what a pity it is now that it will be a long time _____ we see each other again.

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

28. She had a great time _____ as a volunteer at the Athens Olympic Games.

　 A. to work　　　　 B. working　　　　 C. worked　　　　 D. work

27. You have made a few mistakes in your composition but ____ you have done well.

　 A. first of all　　　 B. on the whole　　 C. on the other hand　　 D. for one thing

26. ______ my teacher’s help, I wouldn’t have made such great progress.

　 A. Thanks for　　 B. Owing to　　　 C. But for　　　　 D. As to

25. The traffic problem we are looking forward to seeing _____ should have attracted the local government attention.

　 A. solved　　　 B. solving　　　　 C. solve　　　　　 D. to solve

24. I liked the oil painting better _____ I looked at it.

A. the moment　　　 B. while　　　 C. the more　　　　 D. as

23. I have kept that picture _____ I can see it every day, as it always reminds me of my university days in London.

A. when　　　 B. where　　　　 C. in which　　　　 D. whether