----- Nội dung dịch tự động từ ảnh ----- 6. You take it away with you. You can throw it in one of the garbage cans you find in the park. C. have to D don't have to A. must B. must not 7. If your dog is running free and the police stop you, you will probably pay a fine. B. must not A. must C. have to D. don't have to walk your dog in the park. You can always go somewhere else. There are many places where you can walk a dog. C. have to D. don't have to 8. Of course, you A. must B. must not 9. You can, for example, walk your dog in the fields or on the beach, but even use a dog leash. C. have to there you may A. must B. must not D. don't have to