M: Jane, have you ridden the subway? ,F: Yes, I go to work by underground everyday. ,M: On the Internet, there are 9 most beautiful subways in the world.
(A) F: So there are nine most beautiful subways in China, right? (B) F: Oh, I didn't know that there are nine most beautiful subways in the world. (C) F: There are nineteen most beautiful subways on the earth? That's a lot. (D) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?
B