level

他的英语水平已经达到了高级阶段。

His English ___level has reached an advanced stage.

健身房在商场的二楼。

The gym is on the second ___level of the shopping mall.

这所大学将课程分为三个等级。

The university divides its courses into three ___levels.

图书馆的每一层都有不同的主题分类。

Each ___level of the library has a different subject category.