It's too early. I don't think the ticket office is open ________ nine. A.before B.at C.until D.since...
2022-05-24 00:09:14 72次 2020年上海市奉贤区中考二模英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
It's too early. I don't think the ticket office is open ________ nine.
A.before B.at C.until D.since
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