be busy doing sth和be busy with sth用法详细讲解
问题描述：
be busy doing sth和be busy with sth用法详细讲解
答
一个是忙于某事第二个是忙于某事第一个是忙于做某事例句He is busy with homeworkHe is busy doing homework已通知提问者对您的回答进行评价，请稍等