Eric helped to explain some things about munity medicine to Barack, and of course his ideas were affected by Barack health care.
A. thought about
B. to think about
C. think about
D. thinking about
网友回答
A. thought about
B. to think about
C. think about
(答案→)D. thinking about
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。