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    Two-thirds of the area by trees. A. are covered B. is covered C. have covered D. has covered 【查看更多】

     

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     According to the survey, two thirds of the area__________covered by trees now and 90% of the population__________contributions to the Greening Project in the city.

    A. is   ; has made                     B. are; have made

     C. is; have made                       D. are; has made

     

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