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
答案:D
解析:
解析:
|
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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