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    Keys used for the doors. A. is, opening B. is, opened C. are, opening D. are opened 【查看更多】

     

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    Keys ______ used for ______ the doors.
    [     ]
    A. is, opening　　　
    B. is, opened　 　　
    C. are, opening　 　　
    D. are opened

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    Keys ________ used for ________ the doors．

    [　　]

    A．is, opening

    B．is, opened

    C．are, opening

    D．are opened

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    Keys ________ used for ________ the doors．

    [　　]
    A．

    is, opening

    B．

    is, opened

    C．

    are, opening

    D．

    are opened

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    Keys ________ used for ________ the doors.

    [　　]

    A. is, opening
    B. is, opened
    C. are, opening
    D. are, opened

    查看答案和解析>>

    Keys ________ used for ________ the doors.

    [　　]

    A. is, opening
    B. is, opened
    C. are, opening
    D. are, opened

    查看答案和解析>>


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