Many questions have been answered by John. He must have previewed the lessons last night, he?
A. needn’t
B. hasn’t
C. didn’t
D. mustn’t
网友回答
A. needn’t
B. hasn’t
(答案→)C. didn’t
D. mustn’t
解析: 考查反义疑问句。此题中含有情态动词表推测用法,must have done 表示对过去事情肯定的推测,根据时间last night,动作在昨天晚上,所以用didn’t反问,选C。