10、You _________ have written so long an article.The teacher said 100 words would be enough.

A.mustn’t                      B.needn’t          C.couldn’t                   D.wouldn’t

10、B

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You _________ have written so long an article.The teacher said 100 words would be enough.

A.mustn’t                      B.needn’t          C.couldn’t                   D.wouldn’t

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