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12、You         the boys. Before you did that, as a matter of fact, they had regretted the fight and agreed to make peace.

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

C.wouldn’t have separated                              D.couldn’t have separated

12、A

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You         the boys. Before you did that, as a matter of fact, they had regretted the fight and agreed to make peace.

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

C.wouldn’t have separated                              D.couldn’t have separated

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