Turn these sentences into passive

Turn these sentences into passive
1. Why didn't they help him?
2. How many games has the team played?
3. Where do people speak English?
4. Who are they keeping in the kitchen?
5. How can they open this safe?
6. What books are people reading this year?
7. Who did the police find the lost man?
8 Who looks after the children for you?
9. How long have they waited for the doctor?
10. What time can the boys hand in their papers?