单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．We should blame external factors.
B．We should blame internal factors.
C．We should blame others.
D．We needn’t blame ourselves.
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单项选择题
A．Complain to the student government about her professor.B．Take trigonometry instead of calculus.C．Offer to tutor other math students.D．Get a math tutor to help her out.
A．Complain to the student government about her professor.
B．Take trigonometry instead of calculus.
C．Offer to tutor other math students.
D．Get a math tutor to help her out.
单项选择题
A．To show that air travel is far safer than driving a car.B．To show the great responsibility shouldered by the pilots.C．To give an example of air disasters.D．To show the key role played by air traffic controllers.
A．To show that air travel is far safer than driving a car.
B．To show the great responsibility shouldered by 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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