【正文】
UNIT 1 1. how often 2. on weekends 3. hardly ever 4. twice a week 5. three times a week 6. surf the Inter 7. activity survey 8. the results of 9. as for 10. the results for 11. junk food 12. want sb. to do sth. 13. be good for 14. pretty healthy 15. my eating habits 16. try to 17. get good grades 18. study better 19. why not 20. the same as 21. keep in good health UNIT 2 22. have a stomachache 23. have a sore back 24. have a cold 25. lie down 26. hot with honey 27. see a dentist 28. lots of water 29. a good idea