单项选择题

A．For young people and adults.
B．For immigrants.
C．For factory workers.
D．For poor city children.
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单项选择题
A．To show the key role played by air traffic controllers.B．To show the great responsibility shouldered by the pilots.C．To give an example of air disasters.D．To show that air travel is far safer than driving a car.
A．To show the key role played by air traffic controllers.
B．To show the great responsibility shouldered by the pilots.
C．To give an example of air disasters.
D．To show that air travel is far safer than driving a car.
单项选择题
A．She will live an empty life.B．She will work in a bookstore.C．She will remain single.D．She will earn a lot of money.
A．She will live an empty life.
B．She will work in a bookstore.
C．She will remain single.
D．She will earn a lot of money.
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