"I always get confused about tipping in this country." "Usually you __ to leave 15 percent for a waiter or waitress. Taxi drivers expect 10 or 15 percent, too."

A．was
B．is
C．are
D．belong to

A． any other boy in the class
B．any boy in the class
C．all boys in the class
D．you and me as well as the class