MysistermethimattheGrandTheateryesterdayafternoon,soh...

問題詳情：

  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

知識點：虛擬語氣與情態動詞

題型：選擇題