F: Oh, dear, the office is full of smoke. I can hardly breathe. ,M: I agree. Smoking should not be permitted here.
(A) F: I am really sorry, I did not catch that. Would you slow down, please? (B) F: The air here is so refreshing. (C) F: Yes, we should ban smoking in our office. (D) F: I am sorry, sir. You cannot smoke in this shop.
C