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    13．When _______ to danger，men tend to increase blood pressure，_______ nervous or anxious．（　　）
    A．exposed； feelingB．exposed； felt
    C．exposing； feltD．exposing； feeling

    分析 考查非谓语动词．句意：当人们暴露于危险时，人常常血压上升，感觉紧张焦虑．

    解答 答案A．根据短语be exposed to，expose和men逻辑上是动宾关系，所以用exposed，when exposed to danger在从句中做时间状语，feel和men之间是逻辑上的主谓关系，所以用feeling，做伴随状语，故选A．

    点评 非谓语动词一定弄清楚逻辑关系．

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