A．It’s a new thing and people would like to try it out.
B．They have less time to attend traditional classes.
C．It would save a lot of money for the students.
D．Televised lessons are much easier to understand.

A．He didn’t get the book he needed.
B．He had no idea where the book was.
C．The library is closed on weekend.
D．He was not allowed to check out the book.