Question

. _______C__ is known to all, paper was first made in China. A.That B.Which C.As D.I 求答案解析。

Answer 1

你好,这题的正确答案是C.
在这个句子中,AS引导的是一个非限制性定语从句,AS代替后面的整个句子.
句子的意思是:
众所周知,纸最先是要中国制造的,
此外,这个句子可变为以下重要的句子,请认真学习:
It is known to all that paper was first made in China.
在这个句子中,IT作形式主语,真正的主语是THAT引导的从句,
What is known to all is that paper was first made in China.
在这个句子中,WHAT引导的是一个主语从句,THAT引导的是一个表语从句,

追问

谢谢，
那请问除了用as来引导非限制性定语从句，还可以用什么词来引导？
是不是在非限制性定语从句中，代替句子的只能是as？

追答

不是的,还可以用WHICH,WHO ,如下面的句子:
Tom did well in the final exam, which made his parents very happy.
Yesterday I saw an old man ,who wore the old clothes.

Answer 2

C固定的 这里的AS是代词+连词