◎ 题干
Many new means__________ to prevent the river ____________.
A.have found, from polluting
B.have found, from being polluted
C.have been found, from being polluted
D.has been found, from being polluted
◎ 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“ Many new means__________ to prevent the river ____________.A.have found, from pollutingB.have found, from being pollutedC.have been found, from being pollutedD…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  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。