be busy doing
短语词组
- be e busy doing sth 忙於
- be kept busy doing sth 被迫忙於
- be busy doing sty 忙於做
- be busy doing sth 忙於做某事;忙於;忙於乾某事;忙於做
- be busy doing detail 忙於做
- be busy doing stn 忙於做某事
- be busy doing something 忙於做某事;忙做;忙於做
- doing be busy doing sth 忙於乾某事
- playing be busy doing sth 忙於做某事 返回 be busy doing