Chuyển các câu sau sang câu bị động: ----- Nội dung dịch tự động từ ảnh ----- urn into Passive voice : S + have/has to + be + P2+by+ O 1. We have to feed the chickens three times a day 2 They have to postpone the meeting because of illness. 3 We have to pick fruits very early in the morning. 4. They have to finish their work before 6 p.m 5. They will have to pull down that building. 6. You have to do this job at once. 7. We have to clean the classroom every day. 8. They have to water the flowers every morning. 9. Hoa has to prepare dinner. 10. Do you have to sweep the floor every day?