F: How long have you been living in this city, Jack? ,M: Let me see. I came to this city when I was 23 years old. So 5 years now. ,F: Do you like living in the big city? ,M: Not so much. Air pollution has become such a big problem here now.
(A) F: I agree with you. Heavy traffic is a serious problem. (B) F: I agree with you. Air pollution is not a serious problem. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: I agree with you. Air pollution should be paid more attention to.
D