Đề kiểm tra Tiếng Anh 6 (Theo chương trình thí điểm) - Unit 5: Natural wonders of toe world
II. Complete the passage with must or mustn’t.When you travel on the London Underground, you (1)_______smoke. You (2) _______always buy a ticket and if you have a travel card, you (3) _______use it on the same day. When a train arrives at the station, you (4) _______sta

