（ ） is known to us all is that the 2008 Olympic Games will take place in Beijing.
（A）It
（B）What
（C）As
（D）Which
I truly believed （ ） beauty comes from within.
（A）that
（B）whether
（C）if
（D）what
These shoes look very good. I wonder （ ）. 选项： A. how much cost they are B. how much do they cost C. how much they cost D. how much are they cost
