补全对话：
A  Sorry ,I don’t know     B  You’re welcome .  C  You can take a bus there
D  It is pretty far from here.       E  Thanks a lot 
F   Let me write it down in my notebook.   G   Where can I take a taxi?
A: Excuse me, could you tell me how I can get to the Shuangliu Airport from here?
B: First, walk down this street, then turn right at the second turning,  Next….
A: Wait a minute, please.            
B:OK, next go straight until you see a bus stop.               
A: Do you know how long it takes to get there by bus?
B: Aboutb50 minutes.         You’d better take a taxi.
A:               .
B: You can stand here and wait for a taxi.
A: How long does it take to go there by taxi?
B: I think it will take about half an hour.
A: Thank you very much.
B:                .