Question

We should _____ the power when our TV or computer is not used.

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

Answer 1

B

试题分析：句意：我们应该在不用电脑或者电视的时候把他们关掉。A. turn on“打开”；B. turn off“关掉”；   　　　C. turn up“（声音）调大”；D. turn down“（声音）调小”。结合语境，故选B。