A:   . Could you please tell me the way to the post office?
B: Sure. Go down the road and then turn left. It’s next to Xinhua Bookstore.
A:    ?
B: It’s about 10 minutes’ walk. A: Can I take a bus?
B:    .
A:       bus can I take?
B: The No.9 bus or the No. 12 bus.
A: I see. Thank you very much.
B: You’re  .