Don't interrupt me, I'm busy.
出自:Oxford English DictionaryShe was busy washing a garment in the bowl.
出自: D. H. LawrenceTheir fingers would be busy with the sewing machines or irons, but their minds could be far away.
出自: J. B. PriestleyThe other people seemed unaware of me, busy in their own lives.
出自: C. Priest