27. It’s three years since I last spoke to her.

- I haven’t…spoken to her for three years.……………………………………………………

28. They last visited me 5 years ago.

=> They haven’t…visited me for five years………………………………………………

29. They have studied computer for two years.

=> They started…studying computer two years ago……………………………………………

30. The last time we met each other was ten years ago.

-> We haven’t...met each other for ten years...........................................................

31. The last time I went to Ho Chi Minh City was 6 years ago.

I haven’t…gone to Ho Chi Minh City for  6 years …………………………………………………

32. I’ve never eaten this kind of cake.

It’s the first time I've ever eaten this kind of cake…… …………………………………………………………….

33. It’s three years since I last spoke to her.

-> I haven’t…spoken to her for three years……………………………………………………

34. How long is it since you used the car?

-> When …did you  use the car? ………………………………………………………

35. We started living here 15 years ago.

-> We have…lived her for 15 years………………………………………………………

36. It is over two years since they left their homeland.

They haven’t …came back their homeland for over two years.…………………………………….

37. The last time we met each other was ten years ago.

→ We haven’t …met each other for ten years……………………………………………………

38. I haven’t enjoyed myself so much for years.

=> It’s years ……since I have enjoyed myself so much…………………………………………………

39. This is my first visit to Scotland.

=> I have…never visited to scotland before……………………………………………………

40. This is the first time I have ever eaten such a delicious chicken thigh.

→ This is the…most delicious chiken I have ever eaten......................................................................

41. We haven’t met one another since we left school.

→ The last...time ..we ..met one other....was we at school..............................................................

42. This is the first time I’ve made such a stupid mistake.

→I ……haven't ever made … such a stupid mistake. before …………………….................................................

43. It has been raining for five hours.

→ It started…raining 5 hours ago.………………………….....................................

44. It is over two years since they left their homeland.

→They haven’t …came back their homeland for over two years……………

45. Your brother is the most punctual person I’ve ever met.

→ I’ve …never met such a more that punctual person than your brother……………..…………

46. Nam and his family went on a trip to their home village for two days.

→ Nam and his family had.…a two-day trip …to their home village

47. I haven’t enjoyed myself so much for years.

=> It’s years …… since I have enjoyed myself so much.………………………………..

48. This is my first visit to Scotland.

=> I have……never visited to Scotland before……………………………………

49. I have never heard the song before.

- > This is....the first time I have ever heard the song..............................................................

50. Tom started learning English in 1990.

=> Tom…has learnt …English since 1990………………………..

51. He last met my sister last summer.

=>He……hasn't…met … my sister since  last summer.…………………….

52. How long have you studied medicine?

=>When …did you start studying medicine?…………………………