[speaker001:] Shall we go to the library by subway?
[speaker002:] Yes, it's far quicker and less complicated.
[speaker001:] OK. There is no subway in my city.
[speaker002:] Really?
[speaker001:] Yes. Does it operate night and day?
[speaker002:] Yes, and seven days a week.
[speaker001:] Where do we pay the fare?
[speaker002:] Follow me, please.
[speaker001:] Do I have to pay an additional fare to change trains?
[speaker002:] No, you don't have to.
[speaker001:] OK, I see.