----- Nội dung dịch tự động từ ảnh ----- 13. She hasn't eaten anything since yesterday. She can be very hungry. A B C D 14. His teacher was very angry with him. He mustn't have said that to her. A B C D 15. Children should obey their parents and teachers. A B C D 16. You might try the cheese soufflé. It's really good. A B C D 17. You needn't solve a problem until you identify it correctly. A B C D 18. Be careful with the knife! It's very sharp, you must cut your finger. A B CD 19. Pam can't have cooked since we ordered some pizzas. A C D B 20. They said that you shouldn't use your mobile phone at the cinema. A B C D
