对于从句中连词的用法

各位学哥学姐:
我现在在做从句的时候遇到些问题,能不能帮帮我啊?
_____ is known to all, China has made much progress in developing yourself.
A.It B.That C.as D.Which
错误答案:A 正解:C
They had to use _____ they had to buy the house where they are living now.
A.what B.what that C.that all D.that
错误答案:C 正解:A
如果哪位学哥学姐能够告诉我为什么要选择上述正解,学弟感激不尽!
枫雷
August 9

第一道题不能选A的原因是因为,It.....是一个主语从句后置,用it 作为形式主语,看起来是没有错误,但是却差了一个连词that,判断此类形式的题要看后面的连词,如是是一个逗号,证明不是此种用法,而是一个非限制性的定语从句,在此as 和which都能引导后面整个句子,China has made much progress in developing yourself,但是as有"正如..."的意思,表明非常明显的事实.而which没有此用法.

第二题是这样的啊,因为what是在后面做had 的宾语,所以要选A.
they had what to buy the house where they are living now.
选C错误的原因是因为你把它当作一个定语从句来看待,但是必须是all that,而 不是that all.用作为先行词,用that来引导后面的定语从句!

第一题as is known to us all 是固定搭配。如果一定要用it的话，应该这样说It is known to all that China has made much progress in developing yourself. 第二题的C答案如果改成all that就对了,由that引导以all为先行词的定语从句

As is know to all...=It is know to all that 用it 关键在于它要做形式主语引导宾语从句 that做代词指代all they had"他们所有的"

As is known to all，固定搭配，众所周知的意思。 这里可以填what，也可以填all that，因为what就等于all that。而不是that all。

第一题根据下述规则： 一个句子有且只有一个谓语，若有一个谓语就不能再有第二个谓语。若有另一个谓语，就必有连词，关系代词，副词。一个句子若有连词，关系代词，副词，那此句就二谓语，分句各有自己的谓语。 如果选A，显然前后都是完整的句子，而两个完整的句子中间没有连接词。 第二题 : that如引导宾语,表语,同位语,主语从句,它就是连词,在句中不做成分，但是如果不做成分use后面就缺少宾语 而what在句中既可以充当use的宾语又可以做后面从句的主语