1.Excuse me,please.Is there a post office near here?
(Sorry).I don't know.I'm new here
2.Excuse me,(where) is the nearest post offic?
(Pardon)?
3.where is the nearest post office?
Post office?I don't know,I am (from)another city
4.Excuse me,please.I there a post office near here?
Sorry.I don't know.Ask a (policeman).
But I am apoliceman