单项选择题

When is it cheaper to make an international call

A．10 a.m.
B．5 p.m.
C．11 p.m.
D．8 a.m.
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What is the most expensive type of call
A．Direct dial.
B．Through the operator.
C．Reverse charge call.
D．Calling outside office hours.
单项选择题
If you want to use your Business Telecard International, you have to
A．use a card phone
B．phone on Sunday
C．make a direct dialing call
D．pay extra
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