单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．It should be very high.
B．It should be reasonable.
C．It should be eternal.
D．It should be fixed.
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单项选择题
What do you do if you want to get a desired seat assignment on the airline
A．To call the airline to confirm two months before the departure.
B．To call your family and discuss about it together.
C．To call the airline to confirm one month ahead of the departure.
D．To call the travel agency to confirm three weeks before the departure.
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