Thereisnolightinthedormitory.Theymusthavegonetothelectu...

問題詳情：

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

【回答】

知識點：疑問句 反義疑問句

題型：選擇題