Answer:
1. The trees were blown down by the wind.
2. The thieves were caught by the police.
3. The letter was posted by Anil.
4. We were received by the hostess.
5. The snake was killed with a stick by them/somebody.
6. The minister was welcomed by the people.
7. The parcel is being sent how?
8. This house was built in 1991 by my father.
9. These birds were fed by whom?
10. A red alert was issued by the police.
11. Only vegetarian food is served at the hotel.
12. Those happy days will never be forgotten.
13. Mr. Sinha teaches what?
14. Your sister's marriage was attended by how many people?
15. You need how much money?
