M: Keep running on this machine until I tell you to stop. It helps build up your leg muscle and make you look slimmer. Ready, go! ,F: OK, I will try as much as I can.
(A) M: You can stop running at any time. And take this pills, three times a day. (B) M: I didn’t hear you. Please could you tell me again? (C) M: OK. And what's wrong with your running machine? (D) M: You need to run faster. Listen to me. I'm a good fitness coach.
D