He must have finished the work by the end of last month he?A. mustntB. hadntC. didnt

问题补充：

He must have finished the work by the end of last month, he?

A. mustn

B. hadn

C. didn

D. hasn

答案：

A. mustn

(答案→)B. hadn

C. didn

D. hasn

解析：情态动词must在此表示推测,反意疑问句是将must去掉,因句中有by the end of last month,故用过去完成时,反意疑问句也用hadn 来构成。