题目内容

I can't find Mrs. Fox in her office; she____ for home.

A. might have started
B. might start
C. may be starting
D. may start

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If Jackie is as sick as you say . she ______ see a doctor.

A. better
B. had better
C. had rather
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"Must I answer all the questions?"" No. you ______ answer them all: it will be sufficient if you do four of them ."

A. mustn't
B. shouldn't
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A. can not have done
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She_____ catch the bus every morning, but now she rides with her fiance.

A. used to
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