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9、You made too many mistakes in your exam.You         your lessons last night.

A.mustn’t have prepared                              B.needn’t have prepared

C.shouldn’t have prepared                              D.can’t have prepared

9、D

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You made too many mistakes in your exam.You         your lessons last night.

A.mustn’t have prepared                              B.needn’t have prepared

C.shouldn’t have prepared                              D.can’t have prepared

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