A、Species extinction. B、Ozone depletion. C、Greenhouse effect. D、Air pollution. A

M: Hi Daphne, what are you busy with today?
W: (6)Just some assignments after class.
M: I’m going for a car race. Would you join me? Come on!
W: Oh Roger, do you really find car races fun to go to? It’s incredibly boring just watching the cars go around and around the track, and(8 - 1)I can hardly breathe because of all the smoke and fumes!
M: You aren’t having fun? Daphne,(7)car racing is the most popular sport in America.
W: I hate cars.(8-2)They make so much pollution, which is creating holes in the ozone layer.(8 - 3)And the environmental problems are only getting worse with global warming!
M: Daphne, cars are a part of American culture.(9)Americans have always relied on cars instead of making do with public transportation.
W: Sorry, but what do you mean with making do with public transportation?
M: Oh, when you " make do" with something, that means you accept it reluctantly.
W: OK, I see. But, Roger, it’s often difficult to see how your lifestyle impacts the world. But we need to prevent pollution by driving cars less and investing in renewable energy.
M: Why do you like the environment so much? It’s full of mosquitoes that want to bite you, and bears that want to eat you!
W: If you’re not nice to nature, nature won’t be nice to you. If the polar ice caps melt, ocean levels will rise and flood the coastal cities.
M: Oh Daphne, that isn’t going to happen. You watch too many movies.
W: Roger, most scientists agree that global warming is real, and evidence shows that the polar ice caps have been melting.
M: Well, what do you want me to do about it? I’m just one person. What can I do to make a difference?
W: Well, to start, you could buy more energy-efficient appliances. You could also think about buying an electric or hybrid car.
M: (10)But I don’t have enough money for that!
W: But all of us are responsible for the environment, aren’t we?
M: Alright, Daphne. You’ve convinced me. I need to do more for the environment. I’m going to stop washing my clothes in the laundry machine to save electricity, and stop taking showers to save water.
W: What? Roger, there’s no need to go crazy, you know.
M: But Daphne, I have to do my part to save the environment! I’m going to "recycle" my dirty socks and wear them over and over again.
W: Roger, in that case the disgusting gasses given off by your body are going to make a bigger hole in the ozone layer than all the cars in the world combined!
6. What is Daphne busy with today?
7. What can we learn about car races according to Roger?
8. Which one of the following environmental problems is NOT mentioned in the dialogue?
9. Which one is true about Americans’ lifestyle?
10. How does Roger think about electric cars?