新东方在线：考研英语核心词汇84

考研网

　　be busy with sth. 忙于某事
    be busy doing sth. 忙于做某事
    真题重现：
    Alone in a deserted house, he was so busy with his research work that he felt anything but lonely.
    他自己呆在一个废弃的屋子里忙于自己的研究工作，以至于一点都不感觉到孤独。(1990词汇)
    造句：
    He is busy with proving up a coal deposit.
    他正忙于勘探煤层。
    He is too Busy doing God knows what.
    他太忙，不知道究竟在忙些什么。