[解析]
(1)D 细节理解题.根据第一位老人Pilar Fernandez所述的"One of the best things for her health,she says,is tending livestock (家畜) and a vegetable garden."可知,她认为对她健康的、最好的东西,是饲养牲畜(家畜)和菜园.故选D.
(2)B 细节理解题.根据第二位老人Maximino San Miguel所述的"He prefers reading books about drawing and travelling."可知,他做喜欢做的事情是读书.故选B.
(3)C 细节理解题.根据第四位老人Francisco Nunez所述的He says he doesn't like the pensioners'(领养老金的人) daycare center because it's full of old people,whose negative attitude towards life affects him deeply sometimes.可知,他不愿意与其他老人住在一起的原因是他担心其他老人消极的生活态度会对他产生影响.故选C.
(4)D 推理判断题.根据第一段中的Here 4 of the country's centenarians (百岁老人) give their advice on staying youthful.可知,四位老人各有各的长寿秘诀.故选D.