◎ 题干
This building is too old and dangerous.  It should _  __  dowm          
[     ]
A. to pull       
 B. pull          
C. is pulled      
D. be pulled
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“This building is too old and dangerous.It should ___dowm[ ]A. to pullB. pullC. is pulled D. be pulled…”主要考查了你对  【情态动词】【被动语态】  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。