Question

have attended the meeting

She ___ have attended the meeting，for she was seeing a doctor then．（　　）

A. shouldn’t

B. mustn’t

C. wouldn’t

D. couldn’t

Answer 1

答案D．
“shouldn't have done”用来表虚拟，意思是“本来不应该做某事，但实际做了”；“mustn't不能用来表推测，也不表虚拟，没有“mustn't have done”这种结构；“wouldn't have done”用来表虚拟，意思是“过去将不会做…（实际上做了）”；couldn't have done用来表示对过去发生事情的推测，意思是“过去不可能做…”．根据句子所表达的意思“她不可能参加会议”可知，本题考查的是情态动词表推测，故答案选D．