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    We careful when we are walking across the road.There are too many vehicles now. A. can be B. may be C. must be 【查看更多】

     

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    We ______ careful when we are walking across the road. There are too many vehicles now.

    [     ]

    A. can be
    B. may be
    C. must be

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    We ______ careful when we are walking across the road.There are too many vehicles now.

    A. can be                B. may be                    C. must be

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    We ________ careful when we are walking across the road．There are too many vehicles now．

    [　　]

    A．can be

    B．may be

    C．must be

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