—Must we keep the window open all the time?
A. No, you mustn’t B. No, you can’t. C. No, you don’t have to.
【答案】
C
【解析】略
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—Must we keep the window open all the time?
A. No, you mustn’t B. No, you can’t. C. No, you don’t have to.
C
【解析】略
