如果是泛指“奥运会”，用复数，而具体到哪一届就应该用单数了。例如：The Olympic Games are held every four years.The 29th Olympic Games is going to be held in Beijing in 2008.
Olympic例句
1、I prefer the athletics at the Olympics.
2、The most important in Olympicsis participance instead of wining.
3、It is an improvement over the 2000 Sydney Olympics.
4、But the Olympicsis the goal of every athlete.
5、Secondly, the 2008 Olympicswill be a red pageant.