1.People are killing wild animals for food.

⇒Wild animals are being killed for food.

2.The author has written a special edition for children.
⇒A special edition for children has been written by the author.

3. John returned the money to the bank last night.

⇒The money was  returned by John last night.

4. He visits his grandparents every weekend.

⇒His grandparents are visited every weekend.

5. Did your mother cook this meal?

⇒Was this meal cooked by my mother?

6. People will cut down the trees soon.

⇒The trees will be cut down soon. 

7. The baby has taken his toy outside.

⇒His toy has been taken outside by the baby.

8. Someone will find new petroleum deposits somewhere.

⇒New petroleum deposits will be found by someoone somewhere.

9. Have you done your homework yet?

⇒Have your homework been done yet?

10. Do the children take mini boards to school every day?

⇒Are mini boards taken to school by the children every day?

=>
1. Wild animals are being killed for food.
2. Special editions have been written for children by the author. 
3. The money was returned to the bank by John last night.
4. His grandparents are visited every weekend.
5. Was this meal cooked by your mother?
6. The trees will be cut down soon.
7. His toy has been taken outside by the baby.
8. New petroleum deposits will be found somewhere.

9. Has your homework been done yet?
10. Are mini boards taken to school by the children every day?