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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1208

—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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—Wekeepquietinthelibrary.—Yes,