Tom could you your CD player a little bit? Dad is sleeping now.A. turn onB. turn offC. t

问题补充：

Tom, could you your CD player a little bit? Dad is sleeping now.

A. turn on

B. turn off

C. turn up

D. turn down

答案：

A. turn on

B. turn off

C. turn up

(答案→)D. turn down

解析：根据句意爸爸在睡觉，应该请你把CD调小一点儿意思才更符合，turn down表示

此意，故选D,其他短语表示的意思分别为turn on 打开，turn off关上，turn up

调大，都不能选。