问题描述: My brother is busy ----- ----- ------我弟弟正忙着做家庭作业,空格上填什么 1个回答 分类:英语 2014-11-14 问题解答: 我来补答 with his homework.或是:with doing his homework.这里考查的是"be busy with doing sth"这个短语的用法 展开全文阅读