题目内容
There is no light in the dormitory.They must have gone to the lecture, ________?
- A.didn't they
- B.don't they
- C.mustn't they
- D.haven't they
D
must be或must +不定式的完成式是用来表示推测时,反意疑问句的简短问句不能重复must,答案为D.例如:He must be in the reading-room, isn't he?他一定在阅览室里,是不是?
They must have seen the film,haven't they?想必他们一定看了电影,是不是?
You must have lost the book,haven't you?想必你丢了书,对吗?如果陈述句部分中有一个肯定的过去时间状语,须用didn't.例如:They must have visited the Palace Museum yesterday,didn't they?他们昨天去参观故宫了,对吗?
must be或must +不定式的完成式是用来表示推测时,反意疑问句的简短问句不能重复must,答案为D.例如:He must be in the reading-room, isn't he?他一定在阅览室里,是不是?
They must have seen the film,haven't they?想必他们一定看了电影,是不是?
You must have lost the book,haven't you?想必你丢了书,对吗?如果陈述句部分中有一个肯定的过去时间状语,须用didn't.例如:They must have visited the Palace Museum yesterday,didn't they?他们昨天去参观故宫了,对吗?
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