1 ___is known to us all is that the 2008 Olympic Games will take place in beijing.A.It B.What C.As D.Which 3.__ is reported in the newspaper,talks between the two countries are making progress.A.It B.As C.That D.What
问题描述：
1 ___is known to us all is that the 2008 Olympic Games will take place in beijing.
A.It B.What C.As D.Which
3.__ is reported in the newspaper,talks between the two countries are making progress.A.It B.As C.That D.What
答
B what引导一个主语从句，that是宾语从句
D 用it的话就是个前后两句就是个完整的句子，中间不能是逗号，as的话得加it，that的话talks前也要加代词
答
1. B. What引导的主语从句，is相当于等号，that引导表语从句，is左右可以调换位置；
2. A. talks及后面的内容是句子语意上的主语，放句首太长了，用形式主语it代替。
答
1.B.What
2.B.As
答
1.A it is known to sb 正如谁谁谁知道的那样 固定搭配
2.B as is reported 正如被报道的那样 固定搭配
要是非不说固定搭配的话 第二句如果用it/that/what逗号前面就是一个完整的句子了不能用逗号所以用as
答
B,主语从句,修饰ALL,在从句中做主语.只能用WHAT.
B,定语从句,有逗号隔开,引导词又是在句首,只能选AS