Question

To live a low— carbon（低碳）life, we should t________off the lights when we leave the room.

Answer

turn

【解析】

句意：为了过低碳生活，我们应该在离开房间时关闭灯。

根据“To live a low— carbon（低碳）life”可知此处指在离开房间时要关灯。turn off 关闭，should后加动词原型，结合首字母提示，故填turn。