busy后面加什么詞

　　例如：

　　1.The plan for the new book is on ice at the moment.I've been busy with too many other things.

　　寫那本新書的計劃暫時擱一下,我一直忙于太多其它的事情.

　　2.I was busy with my children.

　　我忙于照顧孩子.

　　3.He is busy doing his homework.

　　他正忙著做家庭作業(yè).

　　4.I am busy working.

　　我正忙于工作.