Is anyone sitting here?/Is this seat taken?
这里有人坐吗?
It's prohibited to carry any hazardous materials.
禁止携带危险物品.
Hazardous materials: 危险品
When does your passport expire?
请问您的护照什么时候过期?
Expire: 满期,届期;(期限)终止
My lease will expire on September 30th of this year.
我的租约今年九月三十日到期.
The toliets are occupied.
厕所有人.
Occupy: 占(时间,空间);占用;住
Reading occupies most of my free time.
阅读占去了我空闲时间的大部分.
The bathroom is occupied.
浴室有人在用.