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    Bad habits, formed, are difficult, and sometimes impossible to shake off. A．before B．once C．until D．unless 【查看更多】

     

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    Bad habits, _______ formed, are difficult, and sometimes impossible to shake off.

    A．before B．once C．until D．unless

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    Bad habits, _______ formed, are difficult, and sometimes impossible to shake off.

    A．before            B．once             C．until              D．unless

     

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    Bad habits, ________ formed, are difficult, and sometimes impossible to shake off．

    [　　]
    A．

    before

    B．

    once

    C．

    until

    D．

    unless

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