"想到2008北京奥运会将在北京举行,我们就忍不住兴奋"翻译成英语怎么说?

We couldn't help being excited when thinking of the 2008 Olympic will be held in Beijing.
can't help doing sth 忍不住做某事，因为是过去的事，所以在这里用could好，人自己很兴奋要用excited

http://translate.google.cn/translate_t?hl=zh-CN#
自己去翻译

thinking of the 2008 Olympic will be held in Beijing,I can't help my exciting.

When it comes to that Beijing Olympic games will be held in Beijing, I can't help being excited.