【答案解析】

46. 根據(jù)題干中的定位名詞study和green spaces回文快速定位到文章中的第一段，根據(jù)第一段的信息可得出UK researchers found moving to a green space had a sustained positive effect（英國研究者發(fā)現(xiàn)搬到綠色小區(qū)可以帶來持久的積極影響）。以及“people living in greener urban areas were displaying fewer signs of depression or anxiety（生活在綠色小區(qū)的人們較少表現(xiàn)出抑郁或焦慮的情緒）”這兩處信息可以確定本題的正確選項是B （Add to their sustained happiness）。

47. 本題根據(jù)題干定位詞Dr. White 及usually do定位到本篇文章中的第一段"There could be a number of reasons,” he said, “for example, people do many things to make themselves happier: they strive for promotion or pay rises, or they get married.處，根據(jù)本句信息，可推出人們通常讓自己快樂的事是掙更多的錢，因此本題的正確選項為A（Earn more money.）。

48. 由第一段可知“升值、加薪、中彩票只會給人們帶來短期的快樂，這種快樂在過了六個月到一年后就會消失”，第二段首句“Dr. White said his team wanted to see whether living in greener urban areas had a lasting positive effect on people's sense of well-being or whether the effect also disappeared after a period of time.”進(jìn)一步承接第一段說明Dr. White的研究目的是要知道居住在綠色環(huán)境中給人帶來的積極影響可以持續(xù)多久。故本題正確選項為C選項（How long its positive effect lasts.）。

49. 根據(jù)題干信息可以將本題定位至第三段，在最后一句話中，“He observed that people living in green spaces were less stressed, and less stressed people made more sensible decisions and communicated better.”由最后的communicate better 可以得出本題的正確選項為D （Their communication with others improved.）。

50. 根據(jù)本題題干給出的信息，根據(jù)定位詞Dr. White 和government，可定位至最后一段，提到我們需要資金來建立一個高質(zhì)量的綠色社區(qū)，從最后一段的最后一句話“what we really need at a policy level is to decide where the money is going to come from to help support good quality local green spaces.”可得出本題的正確選項為A（Find financial support.）。

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