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

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单项选择题

The following are all used to attract passengers EXCEPT ______.[A] punctuality [C] free drinks[B] headsets [D] charge-free food

A．The following are all used to attract passengers EXCEPT ______.
B．punctuality
C．headsets
D．free drinks
E．charge-free food

单项选择题

With the intention of attracting a somewhat different type of passenger, the airlines have now begun to concentrate on ______.

A．ensuring that the facilities offered to the executive are indeed superior
B．providing facilities enabling business travelers to work on board
C．organizing activities in which first-class passengers can participate
D．installing sleeping compartments where more privacy is ensured