Knock! Knock!Who's there?Wendy.Wendy who?Wendy bell works again I won't have to knock anymore.
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Two knee who?
Two knee fish!
Goat to the door to see who’s knocking!
Police hurry—I’m freezing out here!
Knock! Knock!Who’s there?Doris.Doris who?Doris locked. Open up!
Harry up and let me in!
Knock! Knock!Who’s there?Heidi.Heidi who?Heidi ‘cided to come over to play!
Q: Knock, knock.
A: Who’s there?
A: Gladys, who?
No one who?