W: It seems you've burned yourself out. M: Pardon. I'm afraid I didn't quite catch you. W: You look tired. You must have overworked yourself. M: Yes, a little bit. I've been hitting the books all these days. W: Why have you been studying so hard? M: I need to review my English. W: So that's what keeps you so busy recently! M: Yes, I've been tied up with my studies. Now, what worries me a lot is my English. W: But why? Your English is very good. M: Thank you. You are very kind. W: No, I'm telling the truth. As an American, I understand you quite well. M: It's very kind of you to say so., Question: What can we learn about the speakers? (A) They're friends (B) They're strangers. (C) They're relatives.
(A) They're friends