代表整个公司，我想感谢您所做的所有工作。

___On ___behalf ___of the entire company, I would like to thank you for all your work.

不幸的是，乔治今天不能和我们在一起，所以我很高兴代表他接受这个奖项。

Unfortunately, George cannot be with us today so I am pleased to accept this award ___on ___his ___behalf.

我代表我们大学英语俱乐部的成员写信欢迎您来到我们的城市。

I am writing ___on ___behalf ___of our college English club members to welcome you to our city.