lavatory

请确保用完卫生间后冲水。

Please make sure to flush the ___lavatory after use.

派对开始前，我需要去趟洗手间。

Before the party starts, I need to use the ___lavatory.

这栋大楼的厕所设施需要紧急维修。

The ___lavatory facilities in this building need urgent repairs.