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    Go back home now, Mary. Your parents ______ your safety.

    A．are concerned about B．are concerned with
    C．are concerned on D．concern of

    A

    解析试题分析:句意：现在回家，玛丽。你的父母担心你的安全。Be concerned about 担心；be concerned with牵涉到,与……有关，其他不构成搭配，根据句意可知选A。
    考点：考查短语辨析

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