11. Which dress does the woman decide to buy?

A. The red one B. The black one C. The blue one

12.Why does the man apologize?

A. He doesn't have any larger sizes

B. He can't let the woman return anything

C. He gave the woman some wrong information

听第9段材料,回答第13至16题。

13. What did the man think of Americans?

A. Health-conscious B. Ignorant C. Lazy

14. Why does the man mention organic foods?

A. To show how influential American food culture is

B. To show how people's attitudes have changed

C. To show that Americans are spending more on food

15.According to the woman, why are things different now?

A. People have access to more information

B. People are more active in general

C. People are more positive

16. What does the woman try to avoid?

A. Watching too much TV B. Eating fast food C. Driving her car

听第10段材料，回答第17至20题。

17. How much sleep should teenagers get?

A. 8 hours a night B. 9 hours a night C. 10 hours a night

18. Why is it difficult for teenagers to go to bed early according to the research?

A. They are unaware of the benefits of good sleep

B. They work too hard at night

C. Their bodies are changing

19.What time do most American high schools start now?

A. At 8:00 am B. At 8: 30 am C. At 9:00 am

20.According to the talk, what should teens do to get a good night's sleep?

A. Do some reading before bedtime

B. Find a school that starts later

C. Limit their screen time

第二部分：阅读理解（共两节，满分40分）

第一节（共15小题；每小题2分，满分30分）

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。