问题描述：
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 for us
D.have made it be possible for us
请说明理由
A.made it possible of us
B.have made us possible
C.have made it possible for us
D.have made it be possible for us
请说明理由
问题解答：
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