occasion|occasions

在婚礼上，他唱了一首专门为这个场合写的歌。

At the wedding he sang a song specially written for the ___occasion.

我有一套西装，但只在特殊场合穿。

I have a suit but I only wear it on special ___occasions.

新国王的加冕礼当然是一个历史性的场合。

The coronation of a new king is, of course, a historic ___occasion.

有一次，我们的老师离开了教室。

On one ___occasion our teacher left the class.

有好几次，我们非正式地开会讨论这个项目。

On several ___occasions， we met informally to discuss the project.

这次聚会对所有参与者来说都是一个欢乐的场合。

The party was a joyous ___occasion for everyone involved.