I didn’t see her in the meeting room this morning. She _____ at the meeting.

I didn’t see her in the meeting room this morning. She _____ at the meeting.

A.mustn’t have spoken

B.shouldn’t have spoken

C.needn’t have spoken

D.couldn’t have spoken

答案及解析： D

不用于否定句；shouldn’t have done sth. 表示“本不应该做某事而实际上做了”；needn’t have done sth. 表示“本来不必做某事而实际上做了”；couldn’t have done sth. 表示“不可能做过某事”。根据题意，选D。