be busy doing
短语词组
- be e busy doing sth 忙于
- be kept busy doing sth 被迫忙于
- be busy doing sty 忙于做
- be busy doing sth 忙于做某事;忙于;忙于干某事;忙于做
- be busy doing detail 忙于做
- be busy doing stn 忙于做某事
- be busy doing something 忙于做某事;忙做;忙于做
- doing be busy doing sth 忙于干某事
- playing be busy doing sth 忙于做某事 返回 be busy doing