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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 6 When was it invented? 单元练习
—Oh, not yet. It ______ in half an hour.
—Hard to say. If it tomorrow, we'll have to put it off.
—They to children in poor areas.
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