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    Many difficulties have as a result of the overuse of coal A. risen B. arisen C. raised D. arose 【查看更多】

     

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    Many difficulties have___as a result of the overuse of coal.

    A. risen         B. arisen      C. raised     D. arose

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    Many difficulties have ______ as a result of the overuse of coal

    A. risen        B. arisen         C. raised          D. arose

     

     

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    Many difficulties have ______ as a result of the overuse of coal

    A. risen        B. arisen         C. raised          D. arose

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