Every possible means _______ to prevent the crash , but the computer doesn’t still work.
A.is used
B.are used
C.has been used
D.have been used
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◎ 解析
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◎ 知识点
根据n多题专家分析,试题“Every possible means _______ to prevent the crash , but the computer doesn’t still work.A.is usedB.are usedC.has been usedD.have been used…”主要考查了你对 【可数名词及其单复数】,【动名词】,【表语从句】,【缩写与简写】 等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。
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