1. Three foreign languages are taught by them at this school.
2. This letter was received by us after his departure.
3. Have you ever been attacked by dogs?
4. Honey is gathered from flowers by bees.
5. The ship was driven by the storm against a rock.
6. Whom was the circulation of blood discovered by?
7. Delicious fruit ice cream is being sold by them there now.
8. We were shown the way out of the wood by the old man.
9. She was offered some interesting work by them.
10. She was prescribed new medicine by the doctor.
11. He is not much thought of.
12. This funny animal was laughed at by everybody.
13. You have been looked for by us the whole morning.
14. Strict discipline will be insisted on.
15. This computer program has just been written by him.