单选题 17. She said that she would be here at seven o'clock. But she didn't ______ until eight.

【正确答案】 B

【答案解析】 A turn on打开；B turn up声音调大，出现露面；C turn out结果是…，被证明是....D turn down声音调小，拒绝。本题翻译为：她说她会在七点到这里，但是到八点她还没有出现。所以B即为正确答案。