We should try our best to prevent waterpolluting(the state of being dirty) because people can't live without water．题目和参考答案——青夏教育精英家教网—

12．We should try our best to prevent waterpolluting（the state of being dirty） because people can't live without water．

分析我们应该尽力防止水污染，因为人离不开水．

解答答案：polluting．结合前后文是说人离不开水，所以要阻止水污染，the state of being dirty表示变脏的状态，也就是污染pollute，结合prevent阻止，用prevent sb/sth （from）doing，pollute的动名词 polluting，故答案是polluting．

点评 prevent…from短语的意思是"阻止…的发生"．类似的短语还有stop…from，keep…from．当prevent/stop…from用于主动语态时，介词from可以省略，但当prevent/stop…from用于被动语态时，介词from不可以省略．如：The heavy snow prevented us from going out for sports．=The heavy snow prevented our going out for sports．大雪阻止了我们外出活动．

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