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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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
单项选择题
What can you do if the international line is engaged
A．Ask the operator to call you back later.
B．Make a "person-to-person" call.
C．Call back outside office hours.
D．Walt and call again when the line is free.
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