Every possible means ______ to prevent the air pollution, but the sky is still - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

Every possible means ______ to prevent the air pollution, but the sky is still not clear.

A．has been used　

B．have been used

C．is used　

D．are used

答案

解析

试题分析：句意：每种可能的方式都被使用过来阻止空气污染，但是天空还是不清楚。Means是单复数同形的单词，因为这里被every修饰，所以means这里是单数，谓语用单数，排除BD，从but the sky is still not clear. 可知这里强调的是已经被使用了，用现在完成时，选A.

核心考点

试题【 Every possible means ______ to prevent the air pollution, but the sky is still 】；主要考察你对句式等知识点的理解。[详细]

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