Chris Hoy of Britain took his third gold medal on the final day of Olympic track cycling Tuesday. There was also gold for Victoria Pendleton, bringing Britain's tally on the track to seven. Argentina won its first gold of the Olympic Games, taking the madison and dealing the only blow to Britain's dominance on the track. “I didn't think about three gold medals. Even today I just thought about the sprint itself,” said Hoy, after defeating his compatriot Jason Kenny in the final of the men's sprint. Mickael Bourgain of France took the bronze. World champion Hoy needed only two of the three-race series to defeat Kenny. The British coaches had told both men that they were on their own in the final and would not get any help with tactics. In the women's race, world champion Pendleton easily defeated Anna Meares of Australia, the Athens bronze medalist. It was an expected victory, but still a victory of sorts for Meares. The gold medalist in the now-defunct 500-meter time-trial in Athens has made a remarkable comeback from devastating injury.Guo Shuang of China took the bronze medal, to the cheers of the home crowd, defeating Willy Kanis of the Netherlands. It was a tortuous route to the podium for Guo. In the semifinals she beat Meares in the first of the three races, but Meares came back for victory in the second. – AP __