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    Bob used to be a lazy boy, but he is doing his homework very seriously tonight. A. setting out B. preparing for C. going about D. putting on 【查看更多】

     

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     Bob used to be a lazy boy, but he is __________ doing his homework very seriously tonight.
    A. setting out    B. preparing for    C. going about     D. putting on

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    Bob used to be a lazy boy, but he is __________ doing his homework very seriously tonight.
    A. setting out    B. preparing for    C. going about     D. putting on

     

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