A: Hello. Nancy! I haven't seen you for a long time. ?
B: I have been to Shanghai.
A: Really? Did you see the Jinmao Tower?
B: . It's really a modern wonder of the world.
A: ?
B: About 420.5 meters high.
A: ?
B: I have no idea. Maybe 88 floors.
A: ?
B: Yes, it is. But it's the fourth tallest building in the world.
A: Oh. How exciting! I really hope to go there to see it myself.