-- Would you please your radio a little? I can hardly go to sleep.
-- Oh, sorry.
A. turn off
B. turn on
C. turn down
D. turn up
网友回答
A. turn off
B. turn on
(答案→)C. turn down
D. turn up
解析：根据后文内容I can hardly go to sleep.和radio后接a little，可知答案为C，意思是将收音机音量调小点。