Đọc đoạn văn và trả lời câu hỏiIt is Sunday today. Phong and Mai go to four places. First, they go to the bookshop because Mai wants to buy some books and pens. Then they go to the pharmacy because Phong wants to buy some medicine. After that, they go to the zoo because they want to see the animals. Finally, they go to the bakery. They want to buy something to eat because they are hungry.What do they buy at the pharmacy?