许多传统产业雇佣了工人阶级。

Many traditional industries employed the working ___class.

他们渴望中产阶级的生活方式，并送孩子上大学。

They aspired to a middle ___class lifestyle and sent their children to university.

历史上，土地所有权集中在上层阶级手中。

Historically, land ownership was concentrated in the hands of the upper ___class.