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.