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    - I have got a pain in my back. - No wonder. You in front of the computer too long. A. have worked B. are working C. have been working D. worked 【查看更多】

     

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    — I have got a pain in my back. 
    — No wonder. You _____ in front of the computer too long.
    [     ]
    A. have worked
    B. are working
    C. have been working
    D. worked

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