[解析]
(1)D.细节理解题.根据文章第一段,With Britain voting to leave the European Union,and GDP already predicted to slow as a result,it is now a timely moment to assess what he was referring to随着英国投票退出欧盟,国内生产总值预计将因此放缓,现在是评估他所指的时机.可知肯尼迪被引用,因为他赞扬英国国内生产总值;故选A.
(2)A.细节理解题.根据文章第三段,A recent annual study of countries and their ability to convert growth into well﹣being sheds some light on that question最近对各国及其将增长转化为福利的能力的年度研究揭示了这个问题,可知最近的年度研究其结果令人鼓舞;故选D.
(3)C.推理判断题.根据文章最后一段,So what Kennedy was referring to was that while GDP has been the most common method for measuring the economic activity of nations,as a measure,it is no longer enough.It does not include important factors such as environmental quality or education outcomes ﹣ all things that contribute to a person's sense of well﹣being.因此,肯尼迪所指的是,虽然GDP一直是衡量各国经济活动的最常用方法,但作为一种衡量手段,它已经不够了,它不包括环境质量或教育成果等重要因素﹣﹣所有有助于人们幸福感的因素.可知,作者对于使用GDP来衡量一个国家的成功是持批判态度的,结合选项,故选C.