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Doctors say that______ sleep may cause the students poor memory and concentration at school.

A.lacking of B.lacked in C.lacking D.lack for

C

解析试题分析:考查动词和动名词做主语:句意:医生说缺乏睡眠可能导致孩子记忆力差,在学校不能专注。That后面是宾语从句,宾语从句中may cause是谓语,前面的是主语,用动名词,排除BD,lack做动词的时候,后面不能接of ,所以选C。
考点:考查连词短语

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