【題目】We still have some other ways to solve the problem．You ______ be worried．

A． mustn’t B． can’t

C． don’t have to D． may not

【答案】C

【解析】考查情態(tài)動(dòng)詞的否定，A、表示“禁止”B、表示“不能”C、表示“沒有必要”D、表示“可能不”，結(jié)合句意選擇C

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