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    your essay carefully before you hand it in ,some mistakes can surely be avoided, I think. A. Having checked B. Check C. As long as you check, D. While checking 【查看更多】

     

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    _____ your essay carefully before you hand it in, some mistakes can surely be avoided, I think．

    A．Having checked                  B．Check

    C．As long as you check              D．While checking

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