单项选择题

What the author discussed in the previous sections is most probably about ______.

A．various performance-improving drugs
B．the development of modern technology
C．innovative equipment in the sports field
D．technological influences on other people
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单项选择题
Through the last sentence of the passage, the author means ______.
A．many non-traditional sports will appear in the years to come
B．traditional sports as we know will no longer exist in the future
C．it is hard to predict how technological advances will affect sports
D．athletes may put such high-tech equipment as microchips in their brain
单项选择题
A dancer and a single's skater would not have the same skate because ______.
A．they have numerous different boots to choose
B．they can thus maximize their sports performance
C．safety should always be taken into account in sports
D．a single's skater's boot is padded while a dancer's is not
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