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    Mary her homework, but Mike did. A. didn’t do B. doesn’t do C. will do D. is doing 答案:A 解析:根据句意所表转折关系.且由Mike did可知.用一般过去时. 【查看更多】

     

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    Mary _____ her homework, but Mike did.  
    [     ]
    A. didn't do
    B. doesn't do
    C. will do
    D. is doing

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