◎ 题干
Barack Obama has taken personal blame ____ the security failures which led ____ the attempt to
blow up a plane on Chrismas Day.
[     ]
A. of; to          
B. for; to      
C. on; on            
D. in; on
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Barack Obama has taken personal blame ____ the security failures which led ____ the attempt toblow up a plane on Chrismas Day.[ ]A. of; to B. for; toC. on;…”主要考查了你对  【介词和介词短语】  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。