201702 听第8段材料,回答第11至13题。 11. What is the probable relationship between the speakers? A. School friends. B. Teacher and student. C. Librarian and library user. 12. Why does Jim suggest Mary buy the book? A. It’s sold at a discount price. B. It’s important for her study. C. It’s written by Professor Lee. 13. What will Jim do for Mary? A. Share his book with her. B. Lend her some money. C. Ask Henry for help.