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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Unit 6 Period 4 Section B同步练习
— Yes, it's _______________ new dangerous disease(疾病).
— Sorry, we don't have .
—Because it always has _______.
—That's all right. It's my duty to teach ________ English well.
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