unit 2

　　21. He was very busy yesterday; otherwise he___ to the meeting.

　　A. would have ***e B. would ***e C. could ***e D. had ***e

　　22. You can't hear what I'm saying ____ you stop talking.

　　A. only if B. unless C. lest D. except that

　　23. Sorry I can't answer your question. I know____ about the subject.

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

　　24. I ____ get this done immediately or it will be too late.

　　A. must B. can C. may D. might

　　25. He____ working till he was seventy years old.

　　A. kept up B. kept on C. kept to D. kept out

　　26. You ought to take every___ of improving your English.

　　A. time B. thing C. chance D. case

　　27. ____ from space, our earth, with water covering 70% of its surface, appears as a "blue pla***".

　　A. Seen B. Seeing C. To be seen D. Having seen

　　28. The novel ended happily, and the young couple was married____.

　　A. in the final B. in the end C. 'to the last D. in conclusion

　　29. The building___ mostly undamaged after the earthquake, and only minor repairs were necessary.

　　A. discovered B. lasted C. consisted D. remained

　　30. He is an honest official and never any gifts from people who sought his help.

　　A. received B. accepted C. expected D. took up

　　31. He stood waving until the train was out of _____.

　　A. sight B. glimpse C. scene D. reach

　　32. It is important to____ people with respect and understanding.

　　A. treat B. attend C. care D. touch

　　33. The preparations for the trip will be____ till next week.

　　A. put out B. put over C. put off D. put up

　　34. Parking is a big problem____.

　　A. the traffic is so B. is so the traffic

　　C. so the traffic is D. so is the traffic

　　35. Nobody can be set in motion without a force _____ on it.

　　A. act B. to act C. acting D. acted

　　36. I know a number of occasions____ people died from water pollution.

　　A. how B. as C. when D. where

　　37. Dirty water must not be _____ with drinking water.

　　A. joined B. linked C. mixed D. ***bined

　　38. The main road through the city was blocked for three hours today after an accident__ __ two buses.

　　A. containing B. connecting C. including D. involving

　　39. Will you go to the meeting ____ visiting the museum please?

　　A. or B. and C. to D. instead of

　　40. Smith is to study medicine as soon as he ____ military service.

　　A. will finish B. has finished C. finish D. would finish

　　41. If a metal bar is heated, the greater the heat ____, the larger the expansion.

　　A. applied B. being applied C. applying D. is applied

　　42. They did not discover until later____ the car had been destroyed.

　　A. as B. than C. which D. that

　　43. He has already made up his mind. It's no use ____ him.

　　A. try to persuade B. trying to persuade

　　C. to try to persuade D. to try persuading

　　44. It is much easier to talk about social change than____.

　　A. to bring it about B. to bring it on C. to bring it up D. to bring it out