2.C [推理判断题。根据第四段第一句“Happier teenagers have an easier time...they always feel better about life.”可知,感到幸福的青年人更容易完成学业,更容易找到工作,其主要原因是他们总是感到生活是美好的,故答案为C项。]
3.A [词义猜测题。画线词后面的“while the happier ones earned up to 30% more”中while表示对比,根据while后的the happier可推知画线词“gloomy”的意思应为“not happy”,故答案为A项。]
4.D [标题归纳题。本文主要讨论的是幸福能使人更富有,故答案为D项。]
5.D [细节理解题。根据题干关键词ewaste找到文章第一段的“...with electronic waste such as old televisions,computers,radios,cellular telephones and other electronic equipment”,由此可知ewaste中不包括old newspapers,故选D。]
6.C [推理判断题。根据题干关键词ewaste banned from landfills找到文章对应段落第五段,由其中的“Recycling rates continue to rise as more communities have banned electronics from landfills in order to keep ewaste poisons like lead(铅) and mercury(汞) out of garbage dumps.”可知,废旧电子产品会对环境造成危害。故选C。]
7.A [细节理解题。根据题干关键词Mike Fannon找到文章对应段落第四段,由其中的“There are lots of valuable metals that can be recovered and reused instead of just putting them in the landfill,and in certain components there are some materials that should not really be in the landfill.”可知,回收利用才是处理废旧电子的最佳方法。故选A。]
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