◎ 题干
What the doctor warned us is that the ________ sleep may cause anger,poor memory and poor
concentration.
[     ]
A.want in  
B.plenty of
C.lack in  
D.lack of
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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 the doctor warned us is that the ________ sleep may cause anger,poor memory and poor concentration.[ ]A.want inB.plenty ofC.lack inD.lack of…”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。