Television and radio ________to know what is going on all over the world．

A.made it possible of us

B.have made us possible

C.have made it possible of us

D.have made it be possible for us

答案及解析： C

解析：

make+it（作形式宾语）+possible（宾语补足语）跟加for sb．作后面真正宾语不定式的逻辑主语。