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
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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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