C．there are doubts on the research results　its

　　解析：选C。推理判断题。从最后一段的第一句可推知人们对于研究结果有疑问故选C。A项断章取义最后一段只说这一发现对健康有影响意识到行为模仿对饮食的重要影响对健康饮食有好处而并未说行为模仿一定对健康有益；B项忽略了最后一段第二句at least partly”，故B项错误；D项是对最后一段的最后一句的错误理解。B

　　(2017·东北三省四市联考)I was driving home the other day on a sunny afternoon.I had a smile on my face as I sang .Then suddenly I found myself listening to yet another story of a rich famous man who had broken the law.I shook my head as I came to a red traffic light.

　　As I pulled to a stop I noticed four leather­jacketed bikers.They were standing in the middle of the road with two on either side of the light.They looked rough and dangerous，but as I got closer I noticed each one was holding their helmet in their hands.I rolled down my window as one approached my car.“We are the Brother of the Wheel，”he said.“We are collecting money for Christmas Toy Drive for needy children.”As I pulled a dollar out of my wallet I looked past his beard and into his eyes.They shined with goodness and kindness that came right from his soul.I dropped the money in his helmet and waved to the other bikers as I drove off.My good mood had returned.My faith in mankind had been bolstered．And I remembered once again never to judge people by their appearance.

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