A. the urban population decreased rapidly B. the birth rate was very high C. economic conditions were poor D. fewer people married 参考答案:B 答案解析:第一段中提到1951~1956五年中,人口增加15%,这种增长速度在历史上只有1911年之前的10年中出现过。因此,50年代是出生率很高的。
第29题: [单项选择]They were paying for their house by ______. A. installations B. credits C. deposits D. instalments 参考答案:D 答案解析:习惯用法。本题选择项中除A外都与“钱”有关,credit信用贷款,常与on连用,deposit存款,instalment分期付款,原句中用了“by”以…方式,故选D。