一到英语题 求详解

题目

一到英语题 求详解
( ) is known to us all is that the 2008 Olympic Games will take place in Beijing
A.It B.What C.As DWhich
为什么选B 不选A啊

答案

一般说来,在主语从句、表语从句和宾语从句中,如果缺少主语、宾语或表语等成分时,常用what(指物)或who(指人)来引出从句.注意：“众所周知”常用如下句式表达：①As we all know, ...②As is known to us all, ...③It is known to us all that...④What is known to us all is that...