washroom|washrooms

你能告诉我洗手间在哪里吗？

Could you tell me where the ___washroom is?

商场一楼的洗手间正在维修。

The ___washroom on the first floor of the mall is under maintenance.

这家餐厅的洗手间在走廊尽头。

The ___washrooms in this restaurant are at the end of the hallway.