单选题：根据材料回答题： How many people took part in in-line skating in th

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根据材料回答题：

How many people took part in in-line skating in the US in 1995? A．About 17, 7 million.
B．More than 17.7 million.
C．Fewer than 17.7 million.
D．Exactly 17.7 million.

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