————has rencently been done to provide more English books for the students ,a shortage of reading ma

题目

————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?

答案

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.