31. We don’t allow 　　　　in the lecture hall, so you are not allowed 　　　　here.

　　 A. smoking...smoking　　　　　　　　 B. to smoke...to smoke

　　 C. smoking...to smoke　　　　　　　 D. to smoke...smoking

30. There is something wrong with my bike, so I’ll get it 　　　　tomorrow.

　　 A. repairing　　　 B. being repaired C. to repair　　　 D. repaired

29. The most interesting thing 　　　　we should pay attention to is the first thing

　　　 　I have said.

　　 A. which...that　　　　　　　　　　 B. that...which

　　 C. which...which　　　　　　　　　　 D. that...that

28. When first 　　　　to the market, these products enjoyed great success.

　　 A. introducing　　 B. introduced　　 C. to introduce　 D. being introduced

27. There is 　　　　cooking oil left in the house. Would you go and get 　　　　.

　　 A. little...any　 B. little...some　 C. a little...any D. a little...some

26. --I haven’t heard from John for a long time.

　　 --What do you suppose 　　　　　　to him?

　　 A. was happening　　　　　　　　　　 B. to happen

　　 C. has happened　　　　　　　　　　 D. had happened

25. The reporter said that the UFO 　　　　　east to west when he saw it.

　　 A. was traveling　　　　　　　　　　 B. traveled

　　 C. had been traveling　　　　　　　 D. was to travel

24. Many countries are increasing their use of natural gas, wind and other forms of 　　　　.

　　 A. energy　　　　 B. source　　　　 C. power　　　　　 D. material

23. --　　　 　the American film been shown on TV?

　　 --Yes, it 　　　　shown last week.

　　 A. Has...had　　　 B. Has...was　　　 C. Have...had　　 D. Are...was

22. Tom isn’t here. He 　　　　to the library.

　　 A. has been　　　 B. has gone　　　 C. went　　　　　 D. has went