S1:Excuse me. Could you please tell me the way to London?S2:OK. You should take metro at National Station.S1:But how can we find the station?S2:Go ahead and turn left at the second crossing. Go along the street and the station is right in front of you. You won't miss it.S1:Thank you. By the way, do we have to change anywhere by metro?S2:Not necessary. Just remember to get off when you arrive at Longchamp Avenues.S1:Is there any other way to get there?S2:The simplest way is by taxi, of course. But it's much more expensive.S1:I will take the metro. Thank you very much.S2:You are welcome. Q3:Which way do he choose at last?