A、Hot climate. B、Higher income. C、Diet without vegetables. D、Little attention to exercise. D

W: Mike, why are so many Americans overweight?
M: Well, that’s a good question, Lily. You’d think that with the current fitness craze in the US, there wouldn’t be so many overweight Americans.
W: Yes. How many people are overweight?
M: About 40% of Americans are overweight. What’s interesting is that one study says that (8) lower-income groups have a higher percentage of being overweight than higher-income groups.
W: Are there any other factors like that in the study?
M: Yes. The study also says that the hotter the climate is, the lower the percentage of fat people is.
W: That makes sense. When it’s hat, you usually don’t feel like eating a lot.
M: Is that why Japanese people are typically skinnier than Americans?
W: Well, our food has less fat and oil than American food does. And Americans eat a lot more meat than we do.
M: You’re right. And we also eat more sugar and junk food. But there’s another reason why so many Americans are fat.
W: What’s that?
M: (9) Nobody works out any more-not even kids. The average American home has the TV on for six hours a day!
W: Wow! No wonder you Americans are so fat. You don’t get enough exercise. Say, Mike, aren’t you getting a little bigger in the waist?
M: Yeah, I guess so.
W: (10) To lose weight, you really need to watch what you eat and get some exercise.
M: Hey, I started a diet and lost ten pounds.
W: So what happened afterwards?
M: (11)I quit and gained it all back plus five pounds.
　　8.  What does the study say about lower-income groups?
　　9.  What is the reason the man gives for Americans’ fatness?
　　10.  What does the woman suggest the man do to lose weight?
　　11.  What happened to the man finally?