be busy doing sth等于什么

be busy doing sth等于什么 be busy doing等于什么 be busy in doing sth be busy doing sth 例句 be busy doing sth/with sth 有什么英语词组像be busy doing sth ,反正就是be.doing sth的词组 be busy with sth 与be busy doing sth be busy doing sth和be busy with sth be busy with sth.be busy doing sth. 英语 翻译 be busy doing sth 用be busy doing sth.句型造句 有没有be busy with doing sth?