I. Chuyển các câu sau sang câu bị động 10. They sent me a present last week. 11. She gave us more information. 12. The chief engineer was instructing all the workers of the plan. 13. They can’t make tea with cold water. 14. Somebody has taken some of my books away. 15. They will hold the meeting before May Day. 16. After class, one of the students always erases the chalk board.