◎ 题干
All possible means ____, but nothing can prevent the buildings ____.
A.has tried; from being pulled down
B.have tried; from pulling down
C.has been tried; from pulling down
D.have been tried; from being pulled down
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“All possible means ____, but nothing can prevent the buildings ____.A.has tried; from being pulled downB.have tried; from pulling downC.has been tried; from …”主要考查了你对  【主谓一致】  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。