第20题: [单项选择]According to the text, the cost increase in the rail industry is mainiy caused by ________. A. the continuing acquisition B. the growing traffic C. the cheering Wall Street D. the shrinking market 参考答案:A 答案解析:[解析] 本题为推断题。本题考察的是对最后一段的理解,主要讲述了兼并所需要的巨额费用远远超过所兼并公司给兼并带来的利润,造成铁路行业费用上涨,据此推断,费用的上涨主要是由“持续兼并”引起的,故A是正确