Change the following sentences from active into passive form.
2. Wh _ questions.
1. When will you do the work ?
2. How many days did she spend finishing 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 ?
16. Who looked after the children for you ?
17. How long have they waited for the doctor ?
18. What time can the boys hand in their paper ?
19. Why didn't they help him ?
20. Who are they keeping in the kitchen ?