问题描述: They crossed the river___ boat里的横线怎么填?填by,还是take,还是on? 1个回答 分类:英语 2014-10-22 问题解答: 我来补答 " They crossed the river (by) boat."“他们乘船渡河.”by 表示方式.比如说by bike 骑自行车; by air 坐飞机.【公益慈善翻译团】真诚为你解答! 展开全文阅读