◎ 题干
Students shouldn't be given so difficult a problem _____ they can not work out.
[     ]
A. that          
B. which          
C. while            
D. as
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Students shouldn't be given so difficult a problem _____ they can not work out.[ ]A. that B. which C. whileD. as…”主要考查了你对  【关系代词】【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。