----- Nội dung dịch tự động từ ảnh ----- 4. Fishing is not allowed in this park. (must) You 5. Every receptionist in our hotel is obliged to wear a uniform. (have to) Every receptionist in our hotel 6. It's forbidden to sell cigarettes to children. (must not) Shops 7. It's optional for waiters to wear a tie. (have to) Waiters
