3.　　　　 In a time of social reform, people’s state of mind tends to keep _______ with the rapid changes of society.

A. terms　　　　　　　 B. pace　　　　　　　 C. progress　　　　　　 D. touch

2.　　　　 -Correct ____ is important.

-I agree. I don’t eat sweets now, for I’m on a _____.

A. diet; diet　　　 B. food; food　　 　　　　 C. diet; food　　　 　　　 D. food; diet

1.　　　　 Swimming is ___ in summer.

A. a great fun　 　　　　　　 B. great fun　 　　　　 C. great funs　 　　　　　　 D. great a fun

54.　　 To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.

A. can 　　　B. would 　　　C. might 　　　D. should

53.　　 There used to be a small school,___________?

A. was there 　　　B. wasn’t it 　　　C. usedn’t there 　　　D. usedn’t it

52.　　 The two strangers talked as if they ____ friends for years.

A should be 　　　B would be 　　　C have been 　　　D had been

51.　　 —Mum, I’ve been studying English since 8 o’clock. ____ I go out and play with Tom for a while?

—No, I’m afraid not. Besides, it’s raining outside now.

A. Can’t　　　　　 B. Wouldn’t　　　　 C. May not　　　　 D. Won’t

49.　　 — I heard they went skating in the mountains last winter.

— It _____ true because there was little snow there.

A. may not be　　　　　 B. won’t be　　　　 C. couldn’t　　 　　D. mustn’t be

50.　　 —What does the sign over there read?

-“No person ______ smoke or carry a lighted cigarette，cigar or pipe in this area．”

A．will　　 　　　　　 B．may　　 　 　　C．shall　　 　 　　D. must

48.　　 I was really anxious about you. You _______ home without a word.

A. mustn’t leave　　 B. shouldn’t have left　　　 C. couldn’t have left　　 D. needn’t leave

47.　　 —We weren’t sure which way to go. In the end we turned right.

—You _____ the wrong way. You _____ left.

A. went; should have turned

B. have gone; must turn

C. went; would have turned

D. had gone; must have turned