Therehavebeenmany的精选

问题详情：阅读理解阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。 Therehavebeenmanycomparisons(比较)madebetweenLondonUndergroundandNewYorkSubway.Theyarethebestknownpublictransportsystems(公...