1. Who prepared the presentation slides?
⟶ By whom ?

2. Who will deliver the packages tomorrow?
⟶ By whom ?

3. Why did the director cancel the trip?
⟶ Why was ?

4. Where will the conference be held next month?
⟶ Where will ?

5. Which article did the editor review?
⟶ Which article was ?

6. How did the chef decorate the cake?
⟶ How was ?

7. Which report did the manager approve?
⟶ Which report was ?

8. When will the library books be returned?
⟶ When will ?

9. Where did the volunteers distribute the flyers?
⟶ Where were ?

10. When did the technician fix the computer?
⟶ When was ?

11. What did the students submit online?
⟶ What was ?

12. Which room did the janitor clean yesterday?
⟶ Which room was ?

13. Where did they plant the new trees?
⟶ Where were ?

14. Did the chef prepare the dessert yesterday?
⟶ Was ?

15. Did the chef prepare the dessert yesterday?
⟶ Was ?

16. Are the employees reviewing the new safety regulations?
⟶ Are ?

17. Did the volunteers set up the exhibition?
⟶ Were ?

18. Are the students completing the online survey?
⟶ Are ?

19. Did the staff check the fire alarms last week?
⟶ Were ?

20. Was the assistant updating the client records?
⟶ Was ?

21. Did the teacher grade the exams?
⟶ Were ?

22. Are the engineers building the new laboratory?
⟶ Are ?

23. Did the company launch the new product last week?
⟶ Was ?

24. Has the assistant arranged the conference room for the meeting?
⟶ Has ?

25. Will the team submit the final report on time?
⟶ Will ?

26. Has the librarian cataloged the new books yet?
⟶ Has ?

27. Has the manager signed all the contracts?
⟶ Has ?

28. Have the engineers tested the new software?
⟶ Have ?

29. Where did the gardener plant the flowers?
⟶ Where were ?

30. What did the manager decide about the budget?
⟶ What was ?

31. Will the engineers test the new prototype tomorrow?
⟶ Will ?

32. Were the students given the instructions clearly?
⟶ Were ?

33. Who monitored the security cameras last night?
⟶ By whom were ?

34. Are the contractors installing the new equipment?
⟶ Are ?

35. Who delivered the packages this morning?
⟶ By whom were ?

36. Is the maintenance team checking the ventilation system today?
⟶ Is ?

37. Are the employees following the updated procedures?
⟶ Are ?

38. Did the company install the new security cameras last week?
⟶ Were ?

39. Did the editor review all the articles before publication?
⟶ Were ?

40. How did the technicians calibrate the laboratory equipment?
⟶ How was ?