【題目】 —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

【答案】C

【解析】

試題分析：句意： 我們必須在圖書館保持安靜。是的。我同意你的看法。我們不需要每次帶學(xué)生卡。Must必須，mustn’t不準(zhǔn)，禁止，don’t have to不必要。結(jié)合語境故選C。

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