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    The scientist knew nothing about the matter, because he was always _________ himself in his study.

    A．burying B．devoting C．focusing D．concentrating

    A

    解析试题分析：考查动词和动词搭配：A. burying 埋葬，bury oneself in…B. devoting奉献，致力于，devote oneslf to …，C. focusing专注，focus…on，D. concentrating专注，concentrate on，句意：科学家不了解这个事情，因为他总是埋头在书房里面。选A。
    考点：考查动词和动词搭配

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