Exercise on active and passive verbs forms

Find the verbs in the following sentences and state whether they are in the active voice or the passive voice.

1. The tiger killed the deer.

2. The boy is learning his lessons.

3. This house was built by my grandfather.

4. Alice has been waiting for a long time.

5. Mother was making a cake.

6. The postman was bitten by the dog.

Source : http://www.englishgrammar.org/active-passive-voice-exercise-ii/

7. The thief was caught.

8. The accused were sent to jail.

9. The loud noise frightened the baby.

10. The dog chased the cat.

11. The letter was posted yesterday.

12. The oldman takes snuff.

13. The cat drank all the milk.

14. That boy of yours has broken my window again.

15. These shoes of mine pinch me terribly.