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    42．A．clean B．cleaned C．to clean D．cleaning 【查看更多】

     

    题目列表(包括答案和解析)

    We should keep our earth ________.

    [　　]

    A．clean

    B．cleaning

    C．to clean

    D．cleaned

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    Don’t put off ________ the room．

    A．clean

    B．cleaning

    C．to clean

    D．cleaned

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    --How long did you spend          the classroom?

    --Half an hour．

    A．cleaning              B．cleaned         C．to clean        D．cleans

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    It's my turn ________ the blackboard today.

    [　　]

    A．clean
    B．cleaned
    C．cleaning
    D．to clean

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    It's my turn ________ the blackboard today.

    [　　]

    A．clean
    B．cleaned
    C．cleaning
    D．to clean

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