--- Seems that Jack is very rich. He is always changing his cars. What is he?--- ______, but I am not quite sure.

I don’t know the meaning of the poem, because I have little ______with modern society. 

 As many successful businessmen believe, courage is as ______ to pioneering work as the intelligence, even more so．

You ________ park here！It's an emergency exit.

It is the duty of the police to ______ social order.