尼罗河流经一个肥沃的山谷。

The Nile River flows through a fertile ___valley.

山顶上有雪，但山谷里一点也没有。

There was snow on the mountain tops, but none in the ___valley.

我的家乡坐落在一个美丽的山谷里。

My hometown is situated in a beautiful ___valley.