第33题: [单项选择]The passage indicates that the conditions that led to overcrowded roads also brought about ______. A. more attractive living conditions for many people B. a healthier younger generation C. greater occupational opportunities D. the population explosion 参考答案:A 答案解析:[解析] 由第二段中的“success in getting people out of tenements of the 19th...jams”可知答案。