7. People hold modern Olympic Games in order to ________.

A. improve their technology B. improve their health C. promote competition

8. According to the dialogue, new technology has affected all the following BUT ______.

A. timing B. awarding C. cheating

听第7段材料, 回答第9至11题。

9. What does the man do when coming across some trouble?

A. Sleeps on it. B. Solves it immediately. C. Asks for help.

10. What does "sleep on" it mean?

A. Sleeping with the problem in mind. B. Taking the problem as a pillow.

C. Sleeping without thinking about the problem.

11. It is mentioned in the dialogue that ___________.

A. scientists still can't explain the phenomenon.

B. it is untrue that sleeping can help solve problems.

C. only the man has the ability to sleep on problems.

听第8段材料, 回答第12至14题。

12. Where does the conversation most probably take place?

A . In the classroom. B. At home. C. In a bus.

13. What has the woman been thinking about recently?

A. The environmental protection. B. The convenience of public transportation.

C. The explosion of the world population.

14. How many aspects did the man mention when he talked about sustainable development?

A. One. B. Two. C. Three.

听第9段材料, 回答第15至17题

15. Where are the two speakers?

A. At the radio station. B. In a studio. C. In the forest.

16. How many kinds of trees grow in one square kilometer?

A. About l, 500. B. About 400. C. About 750.

17. What is the woman?