题目内容
There is no light or sound in the house.They must have gone to the cinema, ________?
[ ]
A.
didn't they
B.
don't they
C.
mustn't they
D.
haven't they
答案:D
解析:
解析:
|
当must表示推测,作“一定,准是”讲时,反意疑问部分的动词形式要根据must后面的动词形式确定;但当句中有表示过去的时间状语时,反意疑问部分用didn't。 |
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