In recent years a number of additional countries have subscribed to the Ottawa Charter.

A．The library is open all day on weekends.
B．The library is open all day daring the week.
C．The library is closed on weekends.
D．The library is open Saturday afternoon.

A．Teacher and student.
B．Clerk and customer in the post office.
C．Clerk and customer in the supermarket.
D．Clerk and customer in the bank.