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    ---- The housework is too much for me, Mum. ---- Sorry, but I can’t help it, dear. I’ve got something important to do, you know. A. having done B. doing C. but do D. do 【查看更多】

     

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    — The housework is too much for me, Mum. 
    — Sorry, but I can't help ____ it, dear. I've got something important to do, you know.
    [     ]
    A. having done
    B. doing
    C. but do
    D. do

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