You her in her office last Friday; she's been out of town for two weeks. A. needn't have s

问题补充：

You her in her office last Friday; shes been out of town for two weeks.

A. needn have seen

B. must have seen

C. might have seen

D. can have seen

答案：

A. needn have seen

B. must have seen

C. might have seen

(答案→)D. can have seen

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