20.
Mr. Benson: We’re in class now. Please switch off your cell phone or turn it to the silent mode.
Jimmy: _______________
Mr. Benson: Okay, Jimmy. But please be more vigilant about your forgetfulness.
(A) I’m sorry, but it’s Lisa’s cell phone that’s ringing.
(B) I’m sorry that I didn’t realize the volume.
(C) Sorry, my feeling is that it’s not disturbing anyone.
(D) Sorry to keep you waiting for your order, sir.