He must have attended the meeting yesterday he?A. didntB. mustntC. needntD. hasnt

问题补充：

He must have attended the meeting yesterday, he?

A. didn

B. mustn

C. needn

D. hasn

答案：

(答案→)A. didn

B. mustn

C. needn

D. hasn

解析：must的反意疑问句是考试的一个难点。记住must反意疑问句首先要根据句中的时间状语，如果没有，则要根据must后面引导的动词的形式。所以此题有时间状语yesterday，为一般过去式，用did