We must try our best to the river being polluted any more.A．separateB．ke
题型：不详难度：来源：
We must try our best to the river being polluted any more.| A．separate | B．keep | C．prevent | D．guard |
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答案
| C |
解析
试题分析：句子意思：我们必须尽最大努力去阻止这条河再被污染。Separate分开、（使）分离、区分、隔开；keep保持、保留；guard保卫、守卫；prevent预防、阻止。C选项最合适，且 prevent ( from ) doing sth.阻止做某事，是固定用法。
点评：在平时的学习中，遇到固定句型一定要总结、记忆，在考试中遇到此类题目，直接拿过来用便可以。这些固定句式在高考英语填空和完形中经常考察，进行同义混淆，需要大家熟练掌握。 |
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