=>
1. was learning/had
2. had/was repairing
3. were you doing/was cleaning
4. were fishing/came
5. shared/was always taking
6. was wondering/rang
7. was having
8. were watching/got
9. was he doing/saw
10. was playing/arrived
11. was sleeping
12. was watching/came
13. saw/was talking
14. began/were working
15. was raining
16. were learning
17. did he live/saw
18. were working
19. was wearing
20. met/was studying
21. was climbing/slipped
