A、Sport. B、Weather. C、Hobby. D、Greeting. B由男士的问句就可以看出他们是在谈论天气，故选B。

M: Can you tell me what time it is now?
W: My watch says 10: 30, but it is always 10 minutes late.
Q: What time is it now?

M: What’ s the temperature today?
W: It’ s five below zero. I’ m freezing.
Q: What are they talking about?