题目内容
—We _______ keep quiet in the library.
—Yes, I agree with you. And we _________ bring our student cards every time.
A. must; mustn’t B. have to; mustn’t
C. must; don’t have to D. have to; don’t have to
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题目内容
—We _______ keep quiet in the library.
—Yes, I agree with you. And we _________ bring our student cards every time.
A. must; mustn’t B. have to; mustn’t
C. must; don’t have to D. have to; don’t have to