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【单选题】

If you think that the illness might be serious, you should not _____ going to the doctor.

[ ]

A.
put off
B.
set about
C.
hold back
D.
give away
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参考解析:
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举一反三

【单选题】My sister met him at the Grand Theatre yesterdays afternoon, so he ________ your lecture.[ ]

A.
couldn't have attended
B.
needn't have attended
C.
mustn't have attended
D.
shouldn't have attended