Помоги,прошу. Необходимо записать все предложения в пассивном залоге ,кроме 3 и 8

1. The flowers are watered by Mary two times a week.2. A new school bag was brought to me by my father.4. The teeth are cleaned by everybody every morning.5. The house was built last year.6. TV is watched by us in the evening.7. The cake was eaten by them at once.9. The city was destroyed by them long time ago.