1. The windows (wash) by the janitor when I arrived.

2. The room (clean) while the students were outside.

3. The cake (decorate) when the guests came.

4. The car (repair) while I waited.

5. The floors (sweep) when the teacher entered.

6. The homework (check) by the teacher yesterday.

7. The garden (water) while the sun was shining.

8. The windows (open) when I arrived.

9. The chairs (arrange) for the meeting.

10. The clothes (iron) by my mother.

11. The cake (bake) when the phone rang.

12. The books (organize) on the shelves.

13. The picture (frame) when I entered the room.

14. The table (set) for dinner when guests arrived.

15. The lamp (repair) by the electrician.

16. The homework (correct) while I was out.

17. The walls (paint) while the students studied outside.

18. The computer system (upgrade) by engineers yesterday

19. The floors (polish) when I passed by.

20. The packages (pack) while the supervisor checked the inventory.

21. The letters (deliver) while I was away.

22. The new computers (install) yesterday afternoon.

23. The homework (check) by the teacher when the bell rang.

24. The documents (type) by the secretary carefully.

25. The posters (hang) when I walked into the room.

26. The experiment (conduct) under strict supervision yesterday.

27. The new software (install) by engineers when the manager arrived.

28. The lecture (record) by the technicians at that time.

29. The conference hall (prepare) for the event last night.

30. The documents (file) by the secretary yesterday.

31. The manager was announcing the meeting when I arrived.
⟶ The meeting .

32. The workers were building a new bridge last week.
⟶ A new bridge .

33. Engineers were repairing the broken machines when I visited.
⟶ The broken machines .

34. They were organizing a charity event yesterday afternoon.
⟶ A charity event .

35. The police were catching the thief at that time.
⟶ The thief .

36. The company was delivering the new products when I called.
⟶ The new products .

37. The photographer was taking many beautiful pictures at the wedding.
⟶ Many beautiful pictures .

38. The students were presenting their projects when the principal came in.
⟶ Their projects .

39. The students were decorating the classroom for the festival.
⟶ The classroom .

40. Volunteers were collecting the donations during the event.
⟶ The donations .