51. How long has she written the play?
→ How long
→ When
52. How long have they been married?
→ When
How long
53. How long have Catherine and Henry been engaged?
→ When .
●
54. How long is it since they bought the house?
→ When_
55. How long is it since you saw Mary?
→ When
56. I haven't been to Bristol for three years.
→ The last time
57. I haven't eaten this kind of food before.
→ This is the first
58. I haven't enjoyed myself so much time for years..
→ It's years
59. I last saw him when I was a student.
➜ I haven't
1.