F: Excuse me, sir. Visiting hours are over now. Your wife must get some rest. ,M: Oh, I'm sorry doctor, I didn't hear the bell or I would have left earlier.
(A) F: Sorry, sir. But you need to leave. The class is about to start. (B) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) F: Sorry, sir. But you need to leave. You can come back to the hospital to visit your mother tomorrow. (D) F: Sorry, sir. But you need to leave. You can come back to the hospital tomorrow.
D