Question

Before you leave the classroom, please       the lights.

A．turn up

B．turn down

C．turn on

D．turn off

Answer 1

D

此题重点考查四个短语的区别，turn up出现，开大；turn down 减小，关掉；turn on 打开； turn off关掉。句意：在你离开房间之前，请把灯关掉。结合语境可知选D。