Change active into passive: 1. Mary types letters in the office. ………………………………………………………………………………………………… 2. His father will help you tomorrow. ………………………………………………………………………………………………… 3. Science and technology have changed human life. ………………………………………………………………………………………………… 4. Peter broke this bottle yesterday. ………………………………………………………………………………………………… 5. They can’t make tea with cold water. ………………………………………………………………………………………………… 6. Mary is cutting a cake with a sharp knife. ………………………………………………………………………………………………… 7. People speak English in almost every corner of the world. ………………………………………………………………………………………………… 8. You mustn’t use this machine after 5:30 p.m. ………………………………………………………………………………………………… 9. After class, the students always erases the chalk board. …………………………………………………………………………………………… 10. They are watering the flowers. ………………………………………………………………………………………………