Ex IV:

1. They used to livein Hanoi.

2. John used to smoke.

3. Miss Chi used to teach us English when we were students.

4. Ronaldo used to be a football player.

5. My father used to take me to the city when I was a child.

6. He used to be a secretary for my company.

7. Linda used to be late in class.

8. Her brother used to smoke cigarettes.

9. He used to fed the pigs when he was young.

10. There used to be old buildings in this city.

Ex V:

23. eat

24. swim

25. like

26. speaking

27. studying

28. dance

29. sleeping

30. eating

31. eating

32. swimming

33. eating

34. got used to cooking

35. driving

36. living

37. working

38. fed

39. reading

40. restrict

41. eating

42. eat

43. swim

44. like

45. speaking

46. working

47. dance

48. sleeping