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Beijing Ducks v Guangdong Southern Tigers - CBA Final Game 5

Stephon Marbury#3 of the Beijing Ducks during Game 5 the 2012 CBA Championship Finals against the Guangdong Southern Tigers at the MasterCard Center on March 30, 2012 in Beijing,China. (Photo by Gu Zhichao/Sports Illustrated China/Getty Images)

Olympics Quiz: 12 questions from the '12 Games

As the 2012 London Games come to an end, we thought some expert Olympic fans might want to test their knowledge with a little quiz. -- By Chris Wilson, Yahoo! Sports