单项选择题

Which of the following would be the best title for the passage （）

A．Different Forms of Exercise
B．Exercise--The Road to Health
C．Scientific Evidence of Health Benefits
D．Running--A Popular Form of Sport

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单项选择题

It can be learnt from the passage that the health benefits of exercise （）

A．are yet to be proved
B．are to be further studied
C．are supported by scientific evidence
D．are self-evident

单项选择题

A growing interest in sports developed utter （）

A．research showed their health benefits
B．people got the message from magazine covers and postage stamps
C．scientific evidence of health benefits was shown on TV ads
D．an increasing number of races were held in American cities