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There is no light in the room. They must have gone to the lecture. ? A. didn’t t

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There is no light in the room. They must have gone to the lecture. ? A. didn’t t

There isno light in the room. They must have gone to the lecture.__________?

 A. didn’t they       B. haven’t they       C. don’t they          D.mustn’t they

 

试题答案

【答案】

B

【解析】 略