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    The robot can help Mum when there are dirty clothes. A. does the washing B. do the washing C. did the washing D. doing the washing 【查看更多】

     

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    The robot can help Mum ________ when there are dirty clothes．

    [　　]

    A．does the washing

    B．do the washing

    C．did the washing

    D．doing the washing

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