chuyển sang câu bị động ----- Nội dung dịch tự động từ ảnh ----- 7. They are going to broadcast the news. 8. We have to obey the traffic law. 9. Why didn't they encourage students to join in the volunteer project? 10. Do movie stars wear jeans? 11. The teacher corrects our exercises at home. 12. Ali's absence worried his mother. 13. They are building several new schools in our town. 14. We have made great progress in industry, science and medicine. 15. Sam killed a lion last week.