be busy with / be busy about / be busy over / be busy at 这几个搭配,它们在用法上有什么区别?可以随意互换吗?
【答】一般没有什么区别,可以互换。如:
He is busy with [or about, at, over] his work. 他忙于工作。(摘自《英汉多功能词典》新编升级版p.225)