格式 2. ideas for discussion(expressed in statements or questions) 3. related words and expressions 1. Traveling 2. environment protection 3. certificate craze 4. private cars in China 5. bicycles in China 6 4级 格式 top 2. ideas for discussion(expressed in statements or questions) 3. related words and expressions 1. Education in china 2. Part-time job 3. Pollution Populaton 6. Smoking 7. Internet 8. Mobile phone 9. Sports 10. Shopping Habits格式： 1. topic 2. ideas for discussion (expressed in statements or questions) 3. related words and expressions 1. Traveling 2. environment protection 3. certificate craze 4. private cars in China 5. bicycles in China 6. 7. 8. 9. 10. 4 级 格式： 1. topic 2. ideas for discussion (expressed in statements or questions) 3. related words and expressions 1. Education in China 2. Part-time Job 3. Pollution 4. Population 5. Hobbies 6. Smoking 7. Internet 8. Mobile phone 9. Sports 10. Shopping Habits