Question

15．离开房间时记得关灯．
Remember toturnoffthe lights when you leave the room．

Answer 1

分析 turn off．

解答 答案：turn off．结合句子结构remember to do sth表示记得去做某事，表示关灯用turn off the lights，故答案是turn off．

点评 turn on 有启动的意思，turn on the TV
turn off是turn off的反义词，关闭的意思，turn off the tv
turn down--关小，turn down the volume关小音量
turn up--开大，turn up the vulume