单项选择题


Questions 19 to 21 are based on the conversation you have just heard.

A．To go shopping.
B．To meet with her professor.
C．To do research for the story.
D．To take a break from her work.
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单项选择题
A．Their behavior should be attributed to factors beyond their control.B．Their behavior should be attributed to internal factors.C．Their behavior should be attributed to external factors.D．Their behavior should be attributed to others.
A．Their behavior should be attributed to factors beyond their control.
B．Their behavior should be attributed to internal factors.
C．Their behavior should be attributed to external factors.
D．Their behavior should be attributed to others.
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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