◎ 题干
The reason      he could not go there was       his grades were too low.  
[     ]
A. why; because  
B. why; that    
C. for which; which  
D. for which; 不填
◎ 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“The reasonhe could not go there was his grades were too low.[ ]A. why; because B. why; thatC. for which; which D. for which; 不填…”主要考查了你对  【连接代词】【关系副词】【限制性定语从句】  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。