Question

【题目】—Don't do any other things while you are having a class. So please _______ your MP3.
—Sorry, I will do it right now.
A.turn up
B.turn down
C.turn on
D.turn off

Answer 1

【答案】D
【解析】考查短语辨析。turn up调大音量; turn down调小音量; turn on打开。句意：——你上课的时候不要做别的事情。所以请关上你的MP3。
——对不起，我这就做。turn off关闭，关上。故选D。