MysistermethimattheGrandTheateryesterdayafternoon,soh...

问题详情：

  My sister met him at the Grand Theater yesterday 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

【回答】

A

知识点：虚拟语气与情态动词

题型：选择题