Ex4 пожалуйста помогите

1. My question (was answered) yesterday. 2. Hockey (is played) in winter. 3. Mushrooms (are gathered) in autumn. 4. Many houses (were burnt) during the war. 5. His new book (will be finished) next year. 6. Flowers (are sold) in shops and in the streets. 7. St. Petersburg (was founded) in 1703.8. Bread (is eaten) every day. 9. The letter (was received) yesterday, 10. Nick (will be sent) to Moscow next week. 11. I (was given) a very interesting book at the library last Friday. 12. Many houses (are built) in our town every year.