[解析]
(1)C.主旨大意题。根据第二段中第一行的learning a second language can lead to an increase in your brain power学习第二语言有助于增加你的脑力。和倒数第二段的Having two languages gives you two windows on the world and makes the brain more flexible,"he said."You are actually going beyond language and have a better understanding of different ideas掌握两种语言给了你观看两个世界的窗口,你会超越语言本身,对于不同的问题有更好的理解。可以看出a second language 是中心词,所以答案是C.
(2)D.细节推理题。根据第二段中Researchers found that learning other languages changes grey matter.This is the area of the brain which processes information这是大脑进行信息加工的地方。It is similar to the way that exercise builds muscles这就和我们通过锻炼来增强肌肉的作用是一样的。可以知道作者用锻炼肌肉来比喻语言学习对对大脑的作用,使读者能形象的理解这种作用,故选D.
(3)B.目的意图题。根据倒数第二段第一句Professor Dylan Vaughan Jones of the University of Wales has researched the link between bilingualism and maths skills威尔士大学的教授发现了第二语言的学习和数学能力之间的关系。和最后一段中The findings were matched in a study of native Italian speakers who had learned English as a second language between the ages of 2 and 34.Reading,writing,and comprehension were all tested这一发现在一项以意大利语为母语的研究中得到了匹配,这些人在2岁到34岁之间把英语作为第二语言来学习。可知他们的读写以及理解力都很好,所以学习第二语言对于其他科目的学习有好处,故选B.