____is known to the world ,Beijing successful held the 29th Olympic Games 用as 为什么不用which

____is known to the world ,Beijing successful held the 29th Olympic Games 用as 为什么不用which
____is known to the world ,Beijing successful held the 29th Olympic Games 用as 为什么不用which

____is known to the world ,Beijing successful held the 29th Olympic Games 用as 为什么不用which
As,which引导定语从句不能放在句首,放句首要用as代替
其实记住就可以：'x我们都知道“的三种说法
As is known to all,(用逗号）
It is known to all that...（用从句）
What is known to all is that...

As 在这里引导的是状语从句，意思是“正如....”
which 只能引导定语从句，前面必须有先行词

as. 就像是as is known to me一样的感觉。 做多了会有感觉得