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Some students even have no idea of they ...

Some students even have no idea of          they are studying, so they waste much time playing.

A.what             B.when             C.why              D.where

 

C 【解析】 试题分析:考查宾语从句:句意:一些学生甚至不知道为什么学习,因此浪费了很多时间玩。可知用why连接宾语从句,what在宾语从句中做主宾表,这个宾语从句中不缺主宾表,BD选项意思不符合。选C。 考点:考查宾语从句
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