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    26．--Where is Mother? ---She is in the kitchen．She the housework all morning． A．is doing B．was doing C．has done D．has been doing 【查看更多】

     

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    ---- Where is mother?
    ---- She is in the kitchen. She ______ the housework all morning.

    A．was doingB．has doneC．has been doingD．is doing

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