My sister met him at the Grand Theatre yesterday afternoon, so he ______ your le

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问题 My sister met him at the Grand Theatre yesterday afternoon, so he ______ your lecture.

选项 A、couldn’t have attended
B、needn’t have attended
C、mustn’t have attended
D、shouldn’t have attended

答案 A

解析表示对过去的情况进行否定猜测，用couldn’t have done结构。

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