单项选择题

According to the passage, when people are taking part in a sport, they
Which of the following statements about sportsmen is CORRECT

A．They use all their resources to make themselves perfect.
B．They drive the technology forward to some extent.
C．They use instruments to improve their performance.
D．They try to be the leading role in a certain field.
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单项选择题
In the second quarter of the year, American economic
A．grew by 1.5 percent.
B．decreased by 1.5 percent.
C．grew by 8 percent.
D．decreased by 8 percent.
单项选择题
What kind of people created the concept of low carbon life
A．People who want to protect wild animals.
B．People who advocate environment health.
C．People who worry about their health condition.
D．People who are at leading positions.
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