l haven‘t heard from tom recently,l know he is too busy____(write) 说明理由
问题描述:
l haven‘t heard from tom recently,l know he is too busy____(write) 说明理由
答
writing, be busy doing sth是固定短语,忙于做某事
答
writing
be busy doing sth=be busy with sth忙于做某事
祝你进步,有不会的可以再问我哦