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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 1 Unit 1第4课时 Listening & Speaking
—Because people pollute it. They put dirty water and rubbish into it.
—I often study a group.
—Er, I shall count up to ten and then we can begin.
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