Go to the second floor.

去二楼。

It's on the second floor.

在二楼。

It is on the second floor.

它在二楼。

Yes. It's on the second floor.

有的，在二楼。

The library is on the second floor.

图书馆在二楼。

Music rooms, art rooms and a dance hall are on the second floor.

二楼有音乐室、美术室和舞蹈厅。

Our office is on the second floor.

我们的办公室在二楼。

The lunchroom is on the second floor.

午餐室在二楼。

The master's room is on the second floor.

少爷的房间在二楼。

The chemistry lab is on the second floor.

化学实验室在二楼。