题目内容

It ___ very nice if only it were possible.

A. will be
B. would be
C. is
D. were

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I wish I ___ what to do.

A. knew
B. have known
C. know
D. would know

If I had hurried, I ___ the train.

A. would catch
B. could catch
C. would have caught
D. had caught

He insisted that John ___ it.

A. do
B. does
C. did
D. would do

It is high time we ___ off.

A. are
B. were
C. be
D. will be

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