he can t go to the restaurant with you now ,because he isbuey -----his work

问题描述:

he can t go to the restaurant with you now ,because he isbuey -----his work
A:in B:for C:to D:with

D.be busy with sth.忙于某事
另外还有一个busy的短语:be busy doing sth.正忙于做某事 eg.I am busy writing a novel.我正忙于写小说.