A：Let’s go to 哪里by bus.
我们坐公共汽车去
B：Better take the subway. It’s faster, and more convenient.
最好乘地铁吧，地铁更快、更方便。
A：En, where do we pay the fares?
嗯，那我们在哪里买票呢？
B：Just go to the ticket office //service in the subway.
到地铁的售票处去就行了。
A：Do I have to pay an additional fare to change trains?
换乘时还要买票吗？
B：No, you don’t have to. Here comes the train. Be careful! Subway doors open and close automatically.
不用的。哦，车来了。要小心，车门是自动开闭的。
