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24、 I was lost in the strange city; ______it began to rain heavily.

23、. ―Did you pass the oral exam yesterday ?

―No, without luck. How I wish I ______ the pronunciation.

22、---How long are you staying?

 ---I don’t know. ________.

A. Everything is OK        B. Never mind 

C. It depends                 D. It doesn’t matter

21、All _____ guarantee the economic development of our country is stability at home and abroad.

A. that we need                B. which we need    

C. that we need to            D. which we need to

20、The children vary considerably in the rate at which they learn these lessons. _____, we make the teaching plans different accordingly.

A. Because of this reason                             B. It is because

C. As a result of                                          D. For this reason

19、The question came up at the conference _____ we should do with the sluggish market.

A. which                B. where               C. how           D. what

18、Human facial expressions differ from those of animals in the degree _____ they can be controlled on purpose.

       A. with which              B. to which           C. of which                 D. for which

17、We didn’t know his telephone number, otherwise we _____ him.

A. would telephone                        B. would have telephoned

C. must have telephoned                D. had telephoned

16、These trees must have been planted three years ago, ___________?

A. weren’t they  B. mustn’t they C. didn’t they  D. haven’t they

15、---What do you think of Andrew?

--- There are some things that are not easy to _________; his coldness is one.

A. put aside  B. put up with C. think of  D. get along with