单项选择题

The following arc all used to attract passengers EXCEPT ______.

A．punctuality
B．sound system
C．free drinks
D．charge-free food
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单项选择题
In Paragraph 5, in-flight service means ______.
A．charge-free air service
B．a new safety device
C．service on the plane
D．flights within one country
单项选择题
One criticism against many international airlines is that they have, in the recent past, ______.
A．catered for the more wealthy people
B．given preferential treatment to executive clients
C．only met the needs of the regular travelers
D．marketed their service with the masses in mind
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