单项选择题

Questions 29 to 31 are based on the passage you have just heard.

A．How to drive a car.
B．How to get a driving license in America.
C．Traffic laws and safety rules in America.
D．The age requirement for driving a car.
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单项选择题
A．Because many people believe in old ways of predicting weather.B．Because city dwellers have no other ways of predicting weather.C．Because it is based on long experience and observation.D．Because we have no other origins of foretelling weather.
A．Because many people believe in old ways of predicting weather.
B．Because city dwellers have no other ways of predicting weather.
C．Because it is based on long experience and observation.
D．Because we have no other origins of foretelling weather.
单项选择题
Why do universities usually use the Library of Congress Classification System
A．Because it is more popular than other systems.
B．Because it is more modern than other systems.
C．Because it is more specific in arranging subjects.
D．Because it is less difficult than other systems.
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