一个不幸的人没看到那个洞，直接掉了进去。

One ___unfortunate person failed to see the hole and fell straight into it.

他总是一个不幸的人，因为坏事总是发生在他身上。

He was always an ___unfortunate person, because bad things happened to him all the time.

不幸的是，音乐会因恶劣天气被取消了。

It was ___unfortunate that the concert was canceled due to bad weather.