I. Chuyển các câu sau đây sang câu bị động 12. They have provided the victims with food and clothing. ⇒.......................................................... 13. The lion was chasing the deer in the forest. ⇒.......................................................... 14. You mustn’t use this machine after 5:30 p.m. ⇒.......................................................... 15. They are taking a lot of measurements to improve the current situations. ⇒.......................................................... 16. The government will introduce new regulations next week. ⇒.......................................................... 17. You must clean the wall before you paint it. ⇒.......................................................... 18. They send certificates to all of the students who have completed the course. ⇒.......................................................... 19. The fire destroyed the ancient building. ⇒.......................................................... 20. Nobody has ever treated me with such kindness. ⇒..........................................................