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题型：单选题 题类：常考题 难易度：普通
牛津版（深圳·广州）2018-2019学年初中英语八年级下册Module 4 Unit 8第2课时Reading(2)
— Yes. But now people here are trying hard to make the air become better and .
—I don't know the _______. Maybe you can ask his good friend Simon.
—Yes, and I feel much better now.
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