[解析]
(1)A.小标题选择.根据本段内容可知,该段主要介绍了健康饮食会使你充满活力.A项:Feed your brain喂饱你的大脑.符合文意.故选A.
(2)G.归纳总结题.根据前文介绍了要不断挑战自己,让头脑一直工作.G项:Remember you brain s a muscle and if you want to get the most out of it,you must use it.把你的大脑看成一块肌肉,如果你想充分利用它,你就必须使用它.符合文意,故选G.
(3)C.联系下文题.根据后文If you choose to be lazy then your body is not going to give you the energy that requires remembering things and completing tasks.可知,如果你选择偷懒,那么你的身体不会给你记忆东西和完成任务的能量.符合文意,故选C.
(4)F.文章衔接题.根据本段小标题Ensure enough sleep确保足够的睡眠.F项:According to studies,sleep helps strengthen and recover your memories.根据研究,睡眠有助于增强和恢复你的记忆力.符合文意,故选F.
(5)E.联系下文题.根据后文Social interaction will help you develop multitasking,problem solving and other skills that are necessary in life to keep your mind sharp.可知,社会互动将帮助你处理任务、解决问题以及培养生活中必要的技能,以此来保持思维敏捷.E项:Conversations require individuals to stay aware and active.交流要求个人保持清醒和活跃.符合文意,故选E.