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What is the most expensive type of call? When is it cheaper to make an international call?

admin2009-04-15  38
问题 What is the most expensive type of call?
When is it cheaper to make an international call?
选项 A、10 a.m.
B、5 p.m.
C、11 p.m.
D、8 a.m.
答案C
解析 从文章中最后一段，You can save money by calling outside office hours，for example，early in the morning，late at night，and on Sundays．可知，要想省钱，你可以在早上一早，或是晚上很晚，周末打电话。所以我们可以推知，晚上11点打电话可以省钱。所以正确的答案为C。
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