◎ 题干
With trees and grass_____ about 35% of the urban area,the city of Hefei has taken on a new look.
A.coveredB.being coveredC.to be coveredD.covering
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“With trees and grass_____ about 35% of the urban area,the city of Hefei has taken on a new look.A.coveredB.being coveredC.to be coveredD.covering…”主要考查了你对  【独立主格结构】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。