1. how often 多久一次 2. as for sth/doing sth 至于，关于 3. of course=certainly=sure 当然 4. look after=take care of=care for照顾 5. hardly ever 很少 6. surf the Internet 网上冲浪 7. the results of the student activity survey 学生活动调查结果 8. be good for my health 对我的健康有益 9. her eating habits 她的饮食习惯 10. want us to eat junk food 想让我吃垃圾食品 11. exercise twice a week 一周锻炼两次 12. go skateboarding 去滑板 13. come home from school 放学回家 14. try to eat a lot of vegetables 尽量多吃蔬菜 15. healthy
