Eric helped to explain some things about munity medicine to Barack, and of course his ideas were affected by Barack _____ health care.A.thought aboutB.to think aboutC.think aboutD.thinking about
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D解析试题分析:考查非谓语动词。根据结构可知by后面是动名词做宾语，Barack是动名词的逻辑主语，而其他三个选项不能做介词的宾语，故D选项正确。句意：埃里克帮忙向贝拉克解释有关社区医疗的一些事情，当然他的想法受贝拉克对医疗保健看法的影响。
考点：考查非谓语动词。