The Chinese are proud of the 29th Olympic Games ---- (hold)

The Chinese are proud of the 29th Olympic Games ____ (hold) in Beijing in 2008.
答案是 to be held 表将来.那假如这件事已经发生过了呢.
比如另一个题.
There have been several new events ______ to the program for the 2008 Beijing Olympic Games.
这里填added.是做定语.第一个题为什么不能填held.做定语呢.