单项选择题

In Paragraph 5, "in-flight service" means " ______ ".

A．service on the plane
B．a new safety device
C．flights within one country
D．charge-free air service
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单项选择题
From the passage we can infer that ______.
A．a successful airline in the 1980s meets the needs not only of the masses but also of the wealthy passengers
B．it is more comfortable to sit in the back of jet planes
C．business travelers dislike tourists
D．only by specializing in cheap flights can airlines avoid bankruptcy
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 traveler
D．marketed their service with the masses in mind
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