A. They can make friends with people from other countries.
B. They can get to know people of other cultures and their lifestyles.
C. They can practice speaking foreign languages there.
D. They can meet with businessmen from all over the world.

A. Only if he pays three times of the original fine.
B. Only if he shares the book with others.
C. Only if other students waiting for the book finish using it.
D. Only if he replaces his library card.