成功演出后，她感到非常快乐。

After her successful performance, she ___was ___on ___top ___of ___the ___world.

被大学录取的消息让他感到非常快乐。

The news of his acceptance to university made him ___feel ___on ___top ___of ___the ___world.

每当我与家人共度时光，我都感到非常快乐。

Whenever I spend time with my family, I ___am ___on ___top ___of ___the ___world.