题目内容：

you're supposed to turn off the light before you leave the lab.Anyway,it is your ___to take care
of the lab as a lab assistant

优质解答

You're supposed to turn off the light before you leave the lab.
Anyway,it is your _duty 责任或者义务obligation_to take care
of the lab as a lab assistant.
句子的中文意思是你离开实验室之前应该关灯.不管怎样,关心实验室是你作为一名实验室管理员的责任/义务.