1.) Knock-Knock!
who's there?
Orange.
Orange who?

2.) Knock Knock!
Who's there?
Police.Police
who?

3.)Knock Knock!
Doris.
Doris, who?

4.) Knock Knock!
Who's there?
Norma Lee.
Norma Lee who?

5.) Knock Knock!
Who's there?
Who.
Who who?