somebody/someone, everybody/everyone, anybody/anyone, nobody/no one
Listen! __________ is knocking at the door now.
Does ___________want to play badminton?
Does ___________want to play badminton?
We need __________ who can repair this car. We had an accident yesterday.
Someone and somebody
Someone and somebody have no difference in meaning. Somebody is a little less formal than someone. Someone is used more in writing than somebody. Somebody is more common in speaking.