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。