他们最近搬进了一楼的公寓。

They recently moved into a ___first ___floor apartment.

公司的主要办公室是靠近入口的一楼办公室。

The company's main office is a ___first ___floor office near the entrance.

我们学校有一个为初学者准备的一楼教室。

Our school has a ___first ___floor classroom for beginners.