单选题 Buses were developed at the beginning of the twentieth century to compete with streetcars by providing flexibility greater in routes.

【正确答案】 D

【答案解析】答案：D，flexibility greater>>greater flexibility 分析：考点为词序颠倒，形容词应在名词之前翻译：公共汽车在20世纪初发展起来，并以更灵活的行车路线与电车竞争。