1. Knoked, was ringing
2. Were swimming, came
3. Lended
Was cooked, was studying
4. Где тут 4?
6. Was drinking, was sleeping
7. Started
8. Were eating, were playing
9. Stole, was talking
10. Prepared, were going
11. Sent, was washing
12. Designed
13. Left, was taking
14. Went, was sleeping
15. Were flying, got
16.was cleaning, came
17. Was sewing, visited
18. Invited, were going
19. Was teaching, happened
20. Were riding, hit (тут не уверена, может быть hitted)