对话理解。
A: Excuse me. 80___________________________? I want to post a letter.
B: 81__________________________? There are two post offices in our town.
A: I want to go to the nearer one. 82_________________________.
B: Walk there? OK. Walk along this street and turn right at the second crossing. It is between the
bookstore and the bank. I am sure you can't miss it.
A: Oh, I see. By the way, 83________________________?
B: Only five minutes' walk.
A: Thanks a lot.
B: 84_____________________.
