P83~P90Unit 3 Teenage problemsⅠ. 完形填空1. C2. C3. B4. B5. B6. A7. C8. A9. D10. D11. A12. D13. C14. B15. AⅡ. 閱讀理解A1. D2. B3. D4. DB1. B2. A3. D4. CⅢ. 任務(wù)型閱讀A1. America2. reasons3. prefer4. help5. right6. same7. faster8. importance9. against10. expressingB1. Homework is a big part of going to school.2. Going to a birthday party.3. In study halls.4. More than two hours.5.Understand the task, and