There is a post office _____ the street corner .

A. on          B. in          C. behind      D. across

There is a post office _____ the street corner .

A: Excuse me. Can you tell me ______ to the post office?

B: Of course! Go ______ the street, then ______ left at the corner. You can see a building ______ a book store and a hospital. It is the post office.

A: ______.

B: You're welcome.