完成对话：根据对话内容和所给的句子选项，将对话补充完整。

A. How far is it from here? B. Yes, of course. C. How long does it take to go there by bus? D. It’s about 20 minutes’ walk. E. Do you know where the nearest post office is? F. Where is the bus stop?

A: Excuse me.________ ___________. I want to send some postcards.
B: Walk straight on along the road, and then turn left. The post office is on Fifth Street.
A: _____________________.
B: _____________________. But you can take a bus.
A: Thank you! __________________.
B: About 10 minutes.
A: Ok. I think I’d better take the bus. ___________________.
B: It’s over there. Look! Some people are waiting for a bus there.
A: I see. By the way, can I make a call at the post office?
B: Yes, of course.
A: Thank you very much.
B: You’re welcome.