单项选择题

A．Booking a flight to Spain.
B．Giving Spanish tests to students.
C．Paying for private lessons.
D．Studying continually.
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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．He injured his neck.B．He’s tired of swimming.C．He’s too busy to go swimming.D．He’s afraid to swim in deep water.
A．He injured his neck.
B．He’s tired of swimming.
C．He’s too busy to go swimming.
D．He’s afraid to swim in deep water.
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