A: Pardon me, which train should I take to downtown?
B: First take line 2 and then transfer to line 8.
A: Where am I supposed to transfer?
B: At National Park. Actually every subway station has some electronic maps. You can just select your destination and press the button on the map, it will show you how to take trains.
A: Cool. Thanks. Here comes my train.
(20 minutes later, John gets off line 2 at the National Park station.)。
A: Excuse me, Miss. Where should I go to change line 8?
C: I guess we shall turn right and go straight, just as the sign shows.
A: Oh, I see it. Thank You.
(10 minutes later, John gets off at the Downtown station and he loses his way.)。
A: Excuse me, sir. Can you show me where I am on this map?
D: We are here, the subway station. We are in the heart of the city.
A: Oh, I'm not far from the downtown supermarket, I guess. Where is it?
D: Walk up this street until you get to the first set of traffic lights. Then turn right at the traffic lights.
A: How far up the street are the traffic lights?
D: About 100 meters.
A: Thank you.