单选题
I waited for him half an hour, but he never ______.
A、
turned in
B、
turned down
C、
turned off
D、
turned up
【正确答案】
D
【答案解析】
turn in,上缴,出卖,告发:turn down,关小(音量等),拒绝;turn off,关掉: turn up,出现。
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