3. entered; was drawing.
4. came; was doing.
5. was airing; caught.
6. rang; was leaving.
7. met; was going.
8. was washing; knocked.
9. were dancing; came.
10. was washing; broke.
11. rang; was learning.
12. was playing; saw.
13. fell; was climbing.
14. saw; were playing.
15. entered; saw; were drinking.
16. was doing; made.
17. came; were sitting.
18. was watching.
19. was driving; was feeling.
20. were making; opened.