______ is known to us all is that the 20
题型:选择题
问题:
______ is known to us all is that the 2016 Olympic Games will take place in Rio de Janeiro.
A.It
B.Which
C.As
D.What
______ is known to us all is that the 2016 Olympic Games will take place in Rio de Janeiro.
A.It
B.Which
C.As
D.What