Ex3.

16. obesity-> obese

17. but-> so

18. fruit-> fruits

19. eat-> eating

20. How's-> What's

21. more-> less

22. hurt-> hurts

Ex4.

23. advertisement

24. allergic

25. healthy

26. obesity

27. tiredness

28. sickness

Ex5.

29. July had a high fever yesterday so she stayes home from school.

30. Let's go to the movie tonight.

31. Would you mind taking me to the airport Friday morning?

32. Although she eats fruits and veggies every day, she keeps gaining weight.

33. You should do exercise carefully.

34. Joanna doesn't eat much because she doesn't want to be overweight.

Ex6.

35. My mother should have a healthy diet and do regular exercises.

36. You need to take some pain-killers or visit the doctor if you want.

37. The bus stopped and the man got off.

38. Junk food tastes so good but it's bad for your health.

39. You should eat less junk food or you will put on weight.

40. He is a vegetarian so he doesn't eat any meat.