____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.

____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.

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

____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.

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

____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.

 ____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.

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