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题型：单选题 题类：常考题 难易度：容易
新目标英语2017-2018学年八年级上册Unit 9同步评估（音频暂未更新）
—He's a great _______ in the field of modern science.
—That's my . Mind your own!
— No, he is a(n) _______ at a hospital.
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