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题型：单选题 题类：常考题 难易度：困难
牛津版（深圳•广州）2019-2020学年初中英语九年级上册Module 2 Unit 4 Problems and advice第6课时 Integration
—Yes. But yesterday she was seen empty bottles when I entered the classroom.
—Yes, it's_______.
—Sure, no problem. Here you are.
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