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    --- Hi! Jack, you look very tired. --- Yes. I my maths homework all day. A. did B. had done C. have done D. have been doing 【查看更多】

     

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    --- Hi! Jack, you look very tired.

    --- Yes. I _______ my maths homework all day.

    A. did　　 　 B. had done　 　 C. have done　　　 　 D. have been doing

     

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