第12题: [单项选择]What is the reason for the going down of the population in rich countries A. The people there have a bright future. B. The people there have a splendid past. C. The government carries out a family plan. D. The government controls the growth rate. 参考答案:A 答案解析:从第二段末可看出:富裕国家有更高收入,更好的教育和医疗居住条件,也即国家在这方面起了很重要的作用。所以富裕国家人民不像贫穷国家人民一样需要多子女来保障自己的future。