2. 外语
  3. We must take precautious measures to prevent the river______.

We must take precautious measures to prevent the river______.

admin2014-03-21  58
问题 We must take precautious measures to prevent the river______.
选项 A、to be polluted
B、from polluting
C、from being polluted
D、from polluted
答案C
解析
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专业英语四级

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