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 ?