Question

【题目】Hey, look at your pale face; you must have stayed up late last night, _____?

A. haven’t you B. have you

C. did you D. didn’t you

Answer 1

【答案】D

【解析】选D，情态动词用于对过去的推断的时候，如果带有时间状语，反义疑问句助动词借助于did；否则，借助于have/has,本题有时间状语last night，又因为前面是肯定句，故选D。