be busy with sth 与be busy doing sth

be busy with sth 与be busy doing sth be busy doing sth/with sth be busy doing sth和be busy with sth be busy with sth.be busy doing sth. 忙与做某事be busy doing sth\with sth be busy with sth 与be busy doing sth的区别 be busy with sth 与be busy doing sth的区别 ,可以互换吗 be busy with sth 有没有be busy with doing sth? be busy with sth.spend on sth.be busy doing sth.spend doing 造句:be bad at sth be busy doing be busy with sth be excited a be busy in doing sth