F: Tom, why are you surfing the net again? It's a real waste of time I've told you. ,M: I'm doing my homework, mom. I need to write a paper and I'm looking for the information on the net.
(A) F: Wow. It seems that you are reading the news online. You should spend more time on the Net. (B) F: OK. Since you are looking for information for your homework, you can use it. (C) F: Are you doing the shopping online? But you don't know how to surf the Net. (D) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?
B