听下面一段较长对话，回答以下小题。
【小题1】What are the speakers mainly talking about?

A．Buying the books for their course.

B．The money needed for the books.

C．Borrowing the books from others.

【小题2】Why does Dr. Downs want his students to have these five books?

A．These books are not expensive.

B．He wants his students to read more.

C．He wants to discuss them in detail.

【小题3】How does the woman plan to solve the problems about the books?

A．She buys three and the man buys two.

B．She pays the man fifty dollars for sharing.

C．They each pay half of the total amount for the books.