Boy: Let’s play a game. Question one: What’s the most modern train in the world now?
Girl: Mm…I think it’s the Shanghai airport train.
Boy: Right. Question two: What’s the most expensive way to travel around London？
Girl: Maybe it’s by taxi.
Boy: Correct. Question three: What’s the cheapest way to travel around Beijing?
Girl: The bus.
Boy: Right. And Question four: What’s the busiest underground in the world?
Girl: I think it’s the Tokyo underground.
Boy: Yes. Question five: What’s the cheapest way from England to France?
Girl: Mm…Train?
Boy: Sorry, it’s by ship.