If you are busy, you are working hard or giving your time to a special thing
busy
a female bird especially a chicken
hen
sounds that in the background are not the main sounds you hear
background
not any
none
a serious or dangerous situation that needs quick action
emergency
to trade something for something else
exchange(exchanged)…for
to ask something in a serious way
demand (demanded)
something you say or write as a reaction to something that has happened
answer
to make a noise by hitting something, especially a door, with your closed hand in order to get someone's attention
knock (knocked)
to take someone or something with you when you go somewhere
bring (brought)