Rewrite these sentences

1. The last time I was aboard was in the summer of 1978.
 I haven’t __________________________________________________________
2. It's ten years since that house was lived in.
 That house ________________________________________________________
3. I haven't seen him for 2 months.
 I last _____________________________________________________________
4. I haven't been to a concert for over a year.
 The last time ____________________________________________________
5. The last time I really enjoyed myself was your birthday party.
 I haven’t ________________________________________________________
6. It's nearly 20 years since my father saw his brother.
 My father hasn’t __________________________________________________
7. When did you learn to drive?
 How long is it ____________________________________________________
8. The last time I went swimming was when we were in Spain.
 I haven’t ________________________________________________________
9. You haven't tidied this room for weeks.
 It’s weeks _______________________________________________________
10. We started looking for a flat 2 months ago and we are still looking.
 We have ________________________________________________________
11. This is the first time I've been to a night club
 I haven’t ________________________________________________________
12. They have never heard such a thing before.
 This is the first time ________________________________________________
13. Noone has challenged his authority before.
 This is the first time ________________________________________________
14. She left university 2 years ago
 It is _____________________________________________________________
15. My mother was the most warm-hearted person I've ever known.
 I have ___________________________________________________________
16. I haven't been able to see them for over a year.
 It is _____________________________________________________________
17. It stared to rain at 2 o'clock.
 It has ____________________________________________________________
18. I have never been to the ballet before.
 It is ______________________________________________________________
19. John and Mary moved to Edinburgh twenty years ago.
 It is ______________________________________________________________
20. The police started looking for him two months ago.
 For two months now the ______________________________________________
21. I have never seen a dirtier-looking dog.
 This is ____________________________________________________________
22.help me!!!