Writing
："Knowledge is
atreasure, but practice is the key to it."
参考范文：
第二段，解释引言。中心句
+两个原因
+举例。举例应用对比法。
第三段，总结该引言的合理
+两个理由
+展望未来。
短对话1. C. Attend the concert.
2. D. None of the passengers were injured or killed.
3. A. An article about the election.
9. C) Export bikes to foreign markets.
长对话二
19. B) Get involved in his community.
20. A) Deterioration in the quality of life.
21. D) They are too big for individual efforts.
22. C) He had done
asmall deed of kindness.
23. B) Pressure and disease.
24. ...