Question

3. When you leave the reading room,you should remember to the lights.

   A. turn on   B. turn down

   C. turn off   D. turn up

Answer 1

3. C

3. C 考査动词短语辨析。

turn on意为“打开”;turn down意为“调小” ；turn off意为 “关闭”；turn up意为“调大”。根据句意：当 你离开阅览室时，你应该记住把灯关上。故 选C.