Severaloftheadministrativepart-考网

Several of the administrative participants recognized the support and leadership from their institution’s chief executive officers as a serious motivating factor at those moments _____.

A.if the problem was challenging
B.as the situation became serious
C.when the challenges seemed overwhelming
D.which the counterpart grew manipulating

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答案： C

本题解析：

句意：当困难难以克服时，许多管理人都把首席执行官的领导和支持看成是克服困难的一个重要激励因素。when the challenges seemed overwhelming当困难难以克服时。at those moments当…时候，后面要接关系副词when引导的定语从句。因此此题C项正确。