练习册

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    ( ) -Jim, come out. Let's go to play football. -Sorry. I'm a math problem. A. working out B. working on C. working for D. working with 【查看更多】

     

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    ----Jim, come out. Let's go to play football. 

     ----Sorry. I'm_    a math problem.

    A. working out  B. working on  C. working for  D. working with

     

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    ----Jim, come out. Let's go to play football.

    ----Sorry. I'm_　 a math problem.

    A. working out B. working on C. working for D. working with

    查看答案和解析>>


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