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题型：单选题 题类：常考题 难易度：普通
新目标（Go for it）版2018-2019学年初中英语九年级全册Unit 13 We're trying to save the earth. 单元练习
—No. We should call 120 first.
— Why not ________________ the numbers from 0 to 100?
sometimes; some time; sometime; some times
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