◎ 题干
The government has to close those small factories to prevent the water of the river ______.  

 [     ]

A. polluting
B. from polluting
C. being polluted
D. polluted
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The government has to close those small factories to prevent the water of the river ______. [ ]A. polluting B. from polluting C. being polluted D. polluted…”主要考查了你对  【动名词的被动式】  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。