◎ 题干
______known to us ,_______ increasing number of students are buried in their studies.
[     ]
A.What is;a
B.It is;the
C.As it is;the
D.As is;an
◎ 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“______known to us ,_______ increasing number of students are buried in their studies.[ ]A.What is;aB.It is;theC.As it is;theD.As is;an…”主要考查了你对  【不定冠词】【关系代词】【非限制性定语从句】  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。