他们邀请了八十位客人参加婚礼。

They invited ___eighty guests to the wedding.

这部电影是一部奇幻小说，大约八十年前由托尔金撰写。

The film is a fantasy novel and it was written by Tolkien about ___eighty years ago.

我的祖母八十岁了。

My grandmother is ___eighty years old.