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    29．E – shopping, when properly ,can save a lot of time and energy. A．do B．doing C．done D．to do 【查看更多】

     

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    E – shopping, when properly________,can save a lot of time and energy

    [　　]

    A．do

    B．doing

    C．done

    D．to do

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    E-shopping, when properly ________, can save us a lot of time and energy．

    [　　]

    A．to do

    B．is done

    C．doing

    D．done

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