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21.I didn’t see your sister at the meeting. If she ______, she would have met my brother.

A. has come              B. did come              C. came                    D. had come

22. When a pencil is partly in a glass of water, it looks as if it ______.

A. breaks                  B. has broken            C. were broken          D. had been broken

23. You didn’t let me drive. If we ______ in turn, you ______ so tired.

A. drove, didn’t get                                   B. drove, wouldn’t get

C. were driving, wouldn’t get                     D. had driven, wouldn’t have got

24. Without the air to hold some of the sun’s heat, the earth at night _______, too cold for us to live.

A. would be freezing cold                          B. will be freezing coldly

C. would be frozen cold                             D. can freeze coldly

25. If only he _______ quietly as the doctor instructed, he would not suffer so much now.

A. lies                      B. lay                       C. had laid                D. should lie

26. What would have happened ________, as far as the river bank?

A. Bob had walked farther                         B. if Bob should walk farther

C. had Bob walked farther                         D. if Bob walked farther

【參考答案】1—5 BABCA  6—10 BBCAC  11—15 ABADD  16—20 BDADB  21—16 DCDACC

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