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    ______the bones under the sand，the scientists concluded that they came from the dinosaurs about 65 million years ago．

    A．Being inspected B．Inspected
    C．Having inspected D．To inspect

    C

    解析试题分析：考查非谓语动词。本题的逻辑主语为the scientists，与inspect之间为主动关系，再根据其动作有先后性，故用having done结构。句意：检查过沙下面的骨头之后，科学家断定它们是来自大约6千5百万年前的恐龙。故C正确。
    考点：考查非谓语动词

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