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    【题目】Increasing government work efficiency is ________ to crack due to unclear government functions, causing departments to pass the task from one to another.

    A. a wet blanket B. a dark horse C. a big hit D. a hard nut

    【答案】D

    【解析】

    考察名词短语。句意：由于政府职责的不清晰，提升政府工作效率是一块难啃的硬骨头，导致各部门之间相互推诿。A. a wet blanket扫兴的人；B. a dark horse黑马，出人意料的人；C. a big hit 热门人物或者事物；D. a hard nut困难的事情。通过后文to crack可知，to crack后置定语修饰，由于是crack（开壳），故用nut作宾语，故选D。

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