A. birth rate has gone up to 1.3 per woman B. people over 65 now constitutes about half the adult population C. its population of under-35s is twice as large as that of over-65s D. by 2030 its working force may have shrunk by 25% 参考答案:D 答案解析:细节性归纳题。文章第l段介绍了德国的人口老龄化问题。根据最后一句可知,到 2030年德国的劳动人口将减少四分之一(a full quarter),即25%。所以正确答案为D。而该段第一句指出:与现在年