6. i haven't seen her for a long time->i didn't ...........
7. how long have you learnt french?->how long ago............
8. when did you strart to listen to classical music?->how long
9. i last saw her 10 years ago->i haven't
10.how long have you bought this car->when did
11. this is the first time he went abroad->he hasn't
12.she started driving 1 month ago ->she has
13.we began eating when it started to rain ->we have
14.it is a long time since we last met>we haven't
15. when did you have it->how long
6. i haven't seen her for a long time
->i didn't see her a long time ago
7. how long have you learnt french?
->how long ago did you start learning French?
8. when did you strart to listen to classical music?
->how long have you listened to classical music?
9. i last saw her 10 years ago
->i haven't seen her for 10 years
10.how long have you bought this car
->when did you buy this car?
11. this is the first time he went abroad
->he hasn't gone abroad before
12.she started driving 1 month ago
->she has driven for 1 month
13.we began eating when it started to rain
->we have eaten since it started to rain
14.it is a long time since we last met
>we haven't met for a long time
15. when did you have it
->how long have you had it?
6. i haven't seen her for a long time->i didn't ..see her a long time ago .........
7. how long have you learnt french?->how long ago.....did you start learning EL ? .......
8. when did you strart to listen to classical music?->how long have you listened to classical music ?
9. i last saw her 10 years ago->i haven't seen her for 10 years
10.how long have you bought this car->when did you buy this car ?
11. this is the first time he went abroad->he hasn't gone abroad before
12.she started driving 1 month ago ->she has started driving for 1 month
13.we began eating when it started to rain ->we have eaten since it started to rain
14.it is a long time since we last met>we haven't met for a long time
15. when did you have it->how long have you had it ?
Chúc bạn học tốt 
6. I didn't see her a long time ago
8. How long did you start to listen to classical music?
9. I haven't seen her for 10 years.
10. When did you buy this car
11. He hasn't gone abroad before
12. She has started driving for 1 month
13. We have begun eating since it started to rain\
14. We haven't met for a long time
15. How long did you have it
6, I haven't seen her for a long time.
=> I didn't see her for a long time ago.
7, How long have you learnt French?
=> How long ago did you start learning French?
8, When did you start listen to classical music?
=> How long have you listened to classical music?
9, I last saw her 10 years ago.
=> I haven't seen her for 10 years.
10, How long have you bought this car?
=> When did you buy this car?
11, This is the first time he went abroad.
=> He hasn't gone abroad before.
12, She started driving 1 month ago.
=> She has driving for 1 month.
13, We began eating when it started to rain.
=> We have eaten since it started to rain.
14, It is a long time since we last met.
=> We haven't met for a long time.
15, When did you have it?
=> How long have you had it?
