这个俱乐部有一个很大的舞池。

The club has a large ___floor for dancing.

在股票交易大厅，活动持续不断。

On the stock market ___floor, activity is constant.

工厂车间里，工人们忙着组装汽车，一片繁忙。

The factory ___floor was busy with workers assembling cars.