1 Minh hasn't written to his pen pal for 5 months
2 I haven't visied Kuala Lumpur for 3 years
3 How long have you studied English
4 They have built this house for 2 months
5 My father has worked in this factory since last week
6 When did he start working in the garden?
7 How long have you learnt music?
8 He has lived in HCM city since he was 8
9 He has learnt English since he was 18
10 They began working in that factory since 5 years ago
11 My father hasn't smoked for 2 years
12 We started learning English 4 years ago
13 My father has given up smoking since last year
14 They started working in that factory in 2001
15 Lan didn't write to maryam a month ago
16 He started living in HN when he was 12
17 I didn't met her a long time ago
18 How long ago did you start learning French
19 When did you buy this car?
20 How long have you listened to classical music
21 I haven't seen her for 10 years
