I am glad to help.

我很高兴帮忙。

I am glad to make friends with you.

我很高兴能和你交朋友。

The head teacher announced, I am glad to say there has been an improvement in behaviour, but not by everyone.

校长宣布：“我很高兴地说，行为有所改善，但不是每个人都这样。”

I am glad to meet you.

我很高兴见到你。

I am glad you like the gift.

我很欣喜你喜欢这个礼物。

I am glad to learn that you have been chosen to study in China.

我很高兴得知你被选中去中国学习。

Thanks for your message and I am glad that you wrote to me for ideas.

谢谢你的留言，我很高兴你写信向我征求意见。

She was the one who convinced me to go, and I am glad she did.

是她说服我去的，我很高兴她去了。

I am glad for you.

我真是为你高兴。

I am glad to say yes.

我很乐意的告诉你，对的。