47．Although this sound like a simple task.great care is needed． A．must B．may C．shall D．should 【查看更多】

 

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Although this        sound like a simple task，great care is needed．

    A．must    B．may    C．shall     D．should

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Although this        sound like a simple task，great care is needed．

A．must    B．may    C．shall     D．should

查看答案和解析>>


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