这个作业怎么做？My sister met him at
MysistermethimattheGrandTheatreyesterdaysafternoon,sohe________yourlecture.[]A．couldn...
My sister met him at the Grand Theatre yesterdays afternoon, so he ________ your lecture. [ ] A．couldn't have attended B．needn't have attended C．mustn't have attended D．shouldn't have attended
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