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【题目】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】考查情态动词的否定,A、表示“禁止”B、表示“不能”C、表示“没有必要”D、表示“可能不”,结合句意选择C

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