A:Excuse me.____ ____ a post office near here?

A:Excuse me.____ ____ a post office near here?
B:I`m ____,I don`t know.Please ___ that policeman.
A:Thank you____ ____ ____.
A:Excuse me.Where`s the nearest post office,please?
Policeman:It's over there.Go ____ this road and ____ the second turning on the left.
A:Thanks a ____.
Policeman:You're ____.