My sister met him at the Grand theatre yesterday afternoon,s

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My sister met him at the Grand theatre yesterday afternoon,so he_______have attended your lecture.
A.couldn't B.needn't C.mustn't D.shouldn't

My sister met him at the Grand theatre yesterday afternoon,so he_______have attended your lecture
昨天下午我妹妹在大剧院碰见了他,因此他【肯定没有】参加你的讲座.

A couldn't 没有
B needn't 不需要
C mustn't 不准禁止
D Shouldn't 不应该

这里根据句意可知,是(推测过去不可能发生的事情,用Couldn't have done),请记住!选A

下面补充一点供你参考,和答题无关（这题标准答案肯定是A）：
但是,也有人提出了该题已不符合现代英语,尤其是美国英语的实际使用情况,应当改进.目前有充分的资料证明mustn't have done也可以用来表示“推测过去不可能发生某事”.例如：
1．His absence mustn't have been noticed．（CGEL）他的缺席一定没有人注意到.
2．Mr．Green mustn'thave received my letter,otherwise he would have replied before now．格林先生一定没有收到我的信,要不然他在这之前早就回信了.

【英语牛人团】牛人倾情奉献,您的满意使我们最大的追求,感谢您的采纳!

My sister met him at the Grand theatre yesterday afternoon,s 有一道英语选择,My sister met him at the Grand Theatre yesterday aft My sister met him at the Grand Theater yeasterday afertnoon, We met him at the school gate yesterday afternoon对地点进行强调,变成强 16.The man I met yesterday _______ to be one of my sister’s It's about _________ from my home to the Grand Theatre. they were (at the movie theatre)yesterday afternoon.对画括号部分提问 The play___now at the Grand Theatre is"The Lion King". There（）a concert at the Grand Theatre nest Sunday. I met him at the barber's.翻译成中文. I met a friend of my father‘s yesterday afternoon?该一般疑问句? 1.l met my cousin in the street yesterday afternoon(改为否定句）