1. was cooking; went; burnt
2. hurt; was skating
3. entered; were feeding
4. visited / was visiting; bought
5. started; were bathing
6. had / was having
7. came; was doing
8. were you doing
9. went
10. were sleeping; went out
11. was reading; came; sat
12. was walking; passed
13. was looking; saw
14. were answering; entered
15. were drinking; came
16. was walking; passed
17. was thinking; fell
18. were listening
19. entered; was writing; were copying
20. were getting; began