Question

【题目】Remember to _____the lights before you leave the lab.

A. turn on B. turn down C. turn up D. turn off

Answer 1

【答案】D

【解析】

句意：在你离开实验室之前，记住关掉灯。A. turn on打开；B. turn down调低；C. turn up调高；D. turn off关掉。根据下文before you leave the lab可知上文是关掉。根据题意，故选D。