【答案】C 【解析】空格处的内容与inclination for risk-taking由and连接，构成并列关系，后面that come with happiness定语从句既修饰空格处的内容，也修饰inclination for risk-taking，所以选项中可以由that come with happiness修饰的只有C选项optimism。 5. [A] echo [B] miss [C] spoil [D] change 【答案】D 【解析】空格处的内容和the way companies invested构成动宾搭配。只有D选项可以和the way companies invested构成通顺语义。故D项正确。 6. [A] imagined [B] measured [C] invented [D] assumed 【答案】B 【解析】原文：So they compared U.S. cities' average happiness_______ by Gallup polling with the investment activity of publicly traded firms in those areas. 所以他们比较美国城市的平均幸福，这种幸福是根据盖洛普在上市公司的投资活动地区民意调查来________。 A imagined 想象，D assumed 假定与民意调查的客观性是不符的，故排除，C invented 发明，与文意不符，故选B measured，衡量，测量。 7. [A] sure [B] odd [C] unfortunate [D] often 【答案】A 【解析】此空的答案需要结合文章上下文来判断。这句话和本篇完型的第二段的首句的含义是相同的。本段首句其实是对于这一中心的重复阐述，因此选A。 8. [A] advertised [B] divided [C] overtaxed [D] headquartered 【答案】D 【解析】原文：firms' investment and R intensity were correlated with the happiness of the area in which they were _________.公司的投资与研发强度与公司所_______的地区的幸福度相关。依据第7题的答案，我们可以推断，这句话所填写的单词和located应该是近义，故选D，headquartered设立总部。 9. [A] explain [B] overstate [C] summarize [D] emphasize 【答案】A 【解析】原文：…could something else about happier cities ______ why firms there spend more on R 此句也是对于本文中心的再次论证。还有其他的什么可以__________公司在幸福的城市加入研发投入力度吗? 这句话之后就是具体的原因陈述。故选A express 解释，阐释。 10. [A] stages [B] factors [C] levels [D] methods 【答案】B 【解析】原文：To find out, the researchers controlled for various ________that might make firms more likely to invest - like size, industry, and sales ,为了找到答案,研究人员控制了各种各样的可能会让公司加大投资的_______--比如大小、行业和销量--，联系上下文，我们可以看出，这个空格其实就是下文size, industry, and sales的上义词，可以包含这三个名词的内容。故选B factors 原因，因素。 11. [A] desirable [B] sociable [C] reputable [D] reliable |