◎ 题干
I'm sorry that the letter you received last week was sent       .    
[     ]
A. in error    
B. for error    
C. at error    
D. with error
◎ 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“I'm sorry that the letter you received last week was sent .[ ]A. in errorB. for errorC. at errorD. with error…”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。