单项选择题


Questions 11 to 18 are based on the conversation you have just heard.

A．She went to Atlanta.
B．She went to a convention.
C．She went to a hospital.
D．She stayed at home.
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单项选择题
Many Americans have taken to treadmill for years by virtue of ______ .
A．its inherent awards to their health
B．its greater consumption of oxygen
C．the compliment paid by authorities
D．the actual benefits from the exercise
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