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    deep down in the earth for thousands of years, the dead forest has rotted away and become coal. A. Buried B. Burying C. Having buried D. Having been buried 【查看更多】

     

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    ________ deep down in the earth for thousands of years, the dead forest has rotted away and become coal．

    A. Having buried                   B．Being buried   

    C．Buried                        D．To be buried

     

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