chuyển sang câu bị đông 1 someone stole her purse 2, the IBM company many offer my sister a job soon 3 Everybody should keep food in the refrigerator to keep it fresh 4 Lien could's open the door of the classroom 5 they should announce that news as soon as possible 6 Phong has to return the scientific book to the library 7 people must repair that old building 8 somebody saw the unidentifited flying objects last night 9 you are supposed to send your application form to the university early 10 they found their room being in disordered arrangement 11 the war destroyed all the ancient constructions 12the government will rebuild the Memorial Monument 13 the students may elect Phong their leader 14 Thu's younger brother dropped his plate of food onto the floor 15 the teacher won't accept papers written in pencils 16 the student are discussing about their new plan 17 the athletse might visit some interesting places after Sea Games