M: Talking about the twenty first century, I think there will be huge changes in the way people use cars. Laws will be made about what kind of car you can own, and when you can use it. ,F: Maybe there'll just be too many of them on the roads. The air will be so seriously polluted that nobody will be able to breathe normally.
(A) M: I am afraid I did not quite catch what you were saying. Please repeat it. (B) M: Yeah, I agree with you. And I think laws of car use will be made because road traffic has to be controlled, like what kind of car you can own. (C) M: Yeah, the air will not be so seriously polluted. Well, I think laws of car use will be made because there will be new ways of travelling. (D) M: Yeah. There will be little changes in the way people use cars. And I think laws of car use will be made because too many people enjoy air travel.
B