________ is known to us all is that the 16th Asian Games will be held in Guangzhou in 2010．

________ is known to us all is that the 16th Asian Games will be held in Guangzhou in 2010．

1. A.
   What
2. B.
   As
3. C.
   Which
4. D.
   It

________ is known to us all is that the 16th Asian Games will be held in Guangzhou in 2010．

       A. What     B. As      C. Which  D. It

________ is known to us all is that the 16th Asian Games will be held in Guangzhou in 2010．

 is known to us all is that the 16th Asian Games will be held in Guangzhou in 2010．

     A. What          B. As               C. Which           D. It