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题型：单选题 题类：常考题 难易度：普通
鲁教版（五四制）初中英语九年级全册Unit 10单元测试
—People near the lake didn't allow them to________ a factory so as not to pollute the water.
—I've kept on thinking about that matter , but I have had no idea.
—Sorry, Mom. I'll ________ at once.
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