问题描述: I always go to work by u_____because it is fast and safe 1个回答 分类:英语 2014-12-06 问题解答: 我来补答 underground by underground = by subway 乘地铁 祝你学习进步,更上一层楼! (*^__^*) 不明白的再问哟,请及时采纳,多谢! 展开全文阅读