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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．Because he filled out the wrong form.B．Because the officer laughed at him.C．Because he didn’t know what form to get.D．Because he didn’t realize the form was in Spanish.
A．Because he filled out the wrong form.
B．Because the officer laughed at him.
C．Because he didn’t know what form to get.
D．Because he didn’t realize the form was in Spanish.
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