长对话 答案
长对话一
9. C) Export bikes to foreign markets.
10. B) The government has control over bicycle imports.
11. A) Extra costs might eat up their profits abroad.
12. C) Conduct a feasibility study.
长对话二
13. B) Anything that can be used to produce power.
14. D) Oil production will begin to decline worldwide by 2025.
15. B) Start developing alternative fuels.