（ ）is known to us all is that the 2008 Olympic Game will take place in BeijingA：It B:What C:As D:Which 为什么?能否把所有选项都讲一下 为什么不选A 而老师说如果选As 则是什么非限定什么的 是不是在什么地方

As is known to us.和It is known to us.后面接什么啊?为啥 It Is known to us 和as is known to us 有什么区别 Taiwan belongs to China,（）is known to us.为啥不能用that~ it is known to us all,as is known to us all和what is known to us all有什么区别 it is well known to us that是什么意思 She is a good woman,___is known to us all. as is known to us that为什么不对呢? lt is known that smoking does great ----[harm]to us. As is known to us 可以怎么造句? As is known to us……和Which is known to us……的区别? As is known to us……和Which is known to us……的区别? ___the emei mountain is famous for its beauty/A as is known to all B it is known to all C it is known to us al that D as we all know thatwhy use C,tell me why and the other why not use them/> 有关as is known to us all,it is known to us all 的辨析1.As is known to us all,the earth is round.2.It is known to us all that the earthe is round.3.what is known to us all is that the whale is not fish but mammal.请问这3个分别是什么从 ----is well known to us all that Taiwan belongs to China.--- is known to us all ,Taiwan is part of--is known to us all that Taiwan is part of china---is known to us all is that Taiwan is part of chinaA.it B.As C.That D.what四题应选什么,为什 是what is known to us that还是what known to us is that要准确回答我们有大考那我说的两个一个都不对吗？ It is known to us all_ _ _ _ _there is harm.哪儿有污染 As is known to us,there is ……怎么分析? 主语从句 代词 ____ he is a good student is known to us all.如何分析,