48.I haven't really enjoyed myself since your birthday party.

49. My father hasn't seen his brother for nearly 20 years.

50. How long has it been since you learnt to drive?

51. I haven't gone swimming since we were in Spain.

52. It's weeks since you tidied your room.

53. We have looked for a flat for 2 months.

54. I haven't been to a night club before.

55. This is the first time they have heard such a thing.

56. This is the first time everyone has challenged his authority.

57. It is 2 years since she left university.

58. I have never known such a more warm-hearted person than my mother.

59. It is over a year since I was able to see them.

#Trang_Huyen

48.I haven't really enjoyed myself since your birthday party.

49.My father hasn't seen his brother for nearly 20 years.

50.How long has it been since you learnt to drive?

51.I haven't gone swimming since we were in Spain.

52.It's weeks since you tidied your room.

53.We have looked for a flat for 2 months.

54.I haven't been to a night club before.

55.This is the first time they have heard such a thing.

56.This is the first time everyone has challenged his authority.

57.It is 2 years since she left university.

58.I have never known such a more warm-hearted person than my mother.

59.It is over a year since I was able to see them.