11. we can avoid some diseases by having balanced meals

12. using a lt of sugar in cooking isn't good for your health

13. watching tv too much is not good for your eyes

14. sleeping helps your recover from a hard working day

15. you should wear a hat to avoid getting sunburn

16. having a running nose is symptom of cold

17. there are many types of exercises that we may participate in

18. the doctor is asking hoa some question about her health

19. stop smoking because it's harmful to health 

20. you should drink a lot of water and eat a lot of vegetables in summer