A．The phone number you need to know is not in your phone book.B．You want to make a long distance call.C．You don’t know the long distance rates.D．You need to know how to put the money in the slot.
A．The phone number you need to know is not in your phone book.
B．You want to make a long distance call.
C．You don’t know the long distance rates.
D．You need to know how to put the money in the slot.