F: You look so fit, Nathan? What do you often do at the gym? ,M: Well, I try to work on specific back and lower back muscles with barbells. But I don't like gyms so much, you know.
(A) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) F: Your back muscle training is useful, no wonder you like gyms. (C) F: After regular trainings, your leg muscles look very beautiful, Nick. (D) F: The barbell training works, as I find your back muscles beautiful.
D