Students should get a good habit of studying, you can’t do any other things while you’re doing homework. So please your MP4.
A. turn on
B. turn up
C. turn off
D. turn down
网友回答
A. turn on
B. turn up
(答案→)C. turn off
D. turn down
解析:根据前文的内容you can’t do any other things while you’re doing homework,可知,关上MP4,故选C