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    If we can make most of renewable energy sources, there will be big rise in the environmental quality. A. /, / B. the, a C. the, / D. /, a 【查看更多】

     

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    If we can make ________most of renewable energy sources, there will be _______big rise in the environmental quality.

    A. /, /　　　　 B. the, a　　　　 C. the, /　　　 D. /, a

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