Question

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

Answer 1

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。