A．To show that air travel is far safer than driving a c-找考题网

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A．To show that air travel is far safer than driving a car.
B．To show the great importance of the pilots.
C．To give an example of air disasters.
D．To show the key role played by air traffic controllers.

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A．They completed all their assignments.B．They studied hard for his tests.C．They competed for the best seats.D．They read all his books.

A．They completed all their assignments.
B．They studied hard for his tests.
C．They competed for the best seats.
D．They read all his books.

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