◎ 题干
— What about the student in your class, Mr. Wang?
— The doctor said that          sleep caused him poor memory and poor concentration.
[       ]
A. lacking of  
B. lacked in    
C. lacking    
D. lack for
◎ 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“— What about the student in your class, Mr. Wang?— The doctor said thatsleep caused him poor memory and poor concentration.[ ]A. lacking of B. lacked inC. …”主要考查了你对  【动名词】  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。