Could you please the radio a bit ? It’s too loud.A. turn upB. turn onC. turn offD. turn

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A. turn up
B. turn on
C. turn off
(答案→)D. turn down
解析：turn up出现，发生；turn on打开，发动；turn off 关掉；turn down关小,调低.句意:你能把收音机调低一点吗?——声音太大了。结合语境可知选D。