11. Why didn’t they help him?
→ Why wasn’t he helped?

12. How many games has the team played?
→ How many games have been played by the team?

13. Where do people speak English?
→ Where is English spoken?

14. Who are they keeping in the kitchen?
→ Who are being kept in the kitchen?

15. How can they open this safe?
→ How can this safe be opened?