1. didn't have
2. have been
3. haven't seen
4. bought
5. has it stopped
6. did Jill finish
7. was
8. saw
9. has already read
10. wasn't
11. bought
12. have never built
13. did you play
14. have just seen
15. hasn't met
16. did you wake
17. didn't visit
18. learnt
19. have they ever burnt
20. did they burn