————has rencently been done to provide more English books for the students ,a shortage of reading materials remains a serious problem.A.What B.Though what C.In spite of what D.That 请问为什么要选C,In spite of +名词,可 what has rencently been done 不也是一个句子吗?

如果选择用what的话，“，”应该改为is，构成一个句子，而in spite of 引导的是一个从句，中间用“，”隔开才可以

what has rencently been done 具有名词的一切用途，不能做句子单独使用。如主语，宾语等。实际上有不少此类结构。
I do not understand what he said.
而且前后转折明显，though, in spide of 表示此类关系。though 只能接句子

用排除法简单一些,这个句子的中间是个逗号,所以整个部分只能是一个句子,而在一个句子中只能有一个谓语例如动词,或者系动词is.在本句子的后半部分主谓宾结构完整,remain是个动词谓语,所以如果没有连词例如and,or,though,but,前半部分只能是个从句.
A what引导的从句中必须有两个谓语,例如what has rencently been done is bad.所以原句子中少了一个谓语
B 尽管有though链接两部分,但是what引导的还是少一个谓语
D that这里没有引导从句,所以前半句是个完整的句子,但没有连词,与逗号矛盾
解释下d答案what has rencently been done to.作为了一个名词它是一个完整的部分.只不过它用了一个句子来修饰了what,
what引导句子的时候非常特殊要仔细变别,一个简单的方法是当what 引导疑问句时例如 what are you doing?这里只要一个谓语,但what引导叙述句即不是问号后面,则一个谓语是他作为名词成分例如 what i am looking at...但两个谓语即是句子例如what i am looking at is the great tree.

C In spite of
因为In spite of的意思是反之;相反;另外... ...
本句第一段的意思是供应更多英文书给学生,可是第二段是缺乏英文书是现在面对的问题.
所以呈现出相反的意思,要用In spite of.
如果你用what has rencently been done, 句子变成疑问句.
而且这句子的第一段和第二段不是相同意思,所以不适合.
What 的另一种用法,句子一样意思:
What has recently been done for the students is providing more English books but a shortage of reading materials remains a serious problem.