问题描述： How often do they do to school by bike? 1个回答 分类：英语 2014-10-20 问题解答： 我来补答 应该是How often do they go to school by bike?吧意思是问他们骑自行车上学的频率,可以回答once a week或者everyday等等之类的 展开全文阅读
