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题型：单选题 题类：常考题 难易度：普通
江苏省盐城市盐都区西片2016-2017学年七年级下册英语开学学情检测试卷
—I don't know. At that time, we were unaware of the coming danger.
—A one-way ticket $40, and you can another $20 for a round-ticket.
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