5. We learned English was 4 years ago.

17. They used to go to Vung tau at the weekend

19. My mother was visiting an old building while My father was going to a traditional craft village.

21. She asked me where I would like after graduation

25. I have worked for this factory for 5 years

26. He used to have a lot of money

29. Although the weather was terrible, we visited uncle Ho mausoleum.

30. He wishes he had enough money to buy a car

31. A new style of jeans has just been introduced in the USA

32. We wish we weren't very poor

33. I wish I have bought the computer yesterday.

40. Although she has a lot of money, she is unhappy