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
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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