be busy doing sth.造句
1、be busy doing sth.(的意思都是“忙于做某事”。)
2、Her mother is busy cooking in the kitchen.be busy doing sth.(忙着做某事（她的母亲正在厨房忙着做饭。）)
1、be busy doing sth.(的意思都是“忙于做某事”。)
2、Her mother is busy cooking in the kitchen.be busy doing sth.(忙着做某事（她的母亲正在厨房忙着做饭。）)