Could you tell me how to get to the rest room?请问卫生间怎么走？

今天的几个句子是有关询问卫生间的：1.Where's the bathroom?卫生间在哪？2.It should be the second door on the left.在你左边的第二个门。3.Oh,there it is. Thank you.哦，在这，谢谢你。4.Where can I wash my hands,please? 请问卫生间在哪？