听下面一段对话,完成第1至3题。 1. What are the speakers mainly talking about? A. Buying the books for their course. B. The money needed for the books. C. Sharing the books with each other. 2. Why does Dr.Downs want his students to have the first five books? A. These books are not expensive. B. He wants his students to read more. C. He wants to discuss them in detail. 3. How does the woman plan to solve the problem about the books? A. She buys three and the man buys two. B. She pays the man fifty dollars for sharing. C. They will share the total amount of money for the books.