----- Nội dung dịch tự động từ ảnh ----- 19. You mobile phone. 17. You 18. Не use your 20. Parrots speak. make wear a fires in the forest. helmet at work. a. mustn't а. can a. can a. can b. shouldn't b. must b. can't b. can't C. should C. may C. shouldn't C. mustn't