【評論主題】【題組】49. When did people begin to see another benefit of green buildings－saving money?(A) In the 1970

【評論內容】第三段開頭就講到‘’接下來十年，人們發現...

【評論主題】【題組】49. When did people begin to see another benefit of green buildings－saving money?(A) In the 1970

【評論內容】第三段開頭就講到‘’接下來十年，人們發現它可以省錢‘’。〔這時是人們最早發現可以省錢的年代〕以第二段提到的年份1970+10年=就是1980。