Turn these sentences into the passive voice

III. Turn these sentences into the passive voice

1. when will you do the work?

2. how many days did she spend to finish the work ?

3. how do you spend this amount of money ?

4. what books are people reading this year ?

5. how did the police find the lost man ?

6. who looked after the children for you ?

7. how long have they waited for the doctor ?

8. what time can the boys hand in their papers ?

9. why didn't they help him ?

10. who are they keeping in the kitchen ?