问题
选择题
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
答案
答案:C
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。