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题型：语法填空（单句） 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
— But nobody knows if it .
—Of course, the plane. I'll have to pay ____ money, but it will take ____ time.
—I ____ volunteer work in the neighborhood.
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