The best way to prevent the air polluting _____ , but the sky is still not clear - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

The best way to prevent the air polluting _____ , but the sky is still not clear.

A．is used

B．are used

C．has been used

D．have been used

答案

解析

考查主谓一致与语态。根据上下文可知最好的方法已经被使用了，但是天空仍然不晴朗。可以反应出过去发生的事情对现在的影响。the best way是单数形式，所以谓语动词用单数。句意：阻止空气污染的最好的方法已经被使用了，但是天空仍然不晴朗。

核心考点

试题【The best way to prevent the air polluting _____ , but the sky is still not clear】；主要考察你对一般现在时等知识点的理解。[详细]

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