Knock Knock?
Who's there?
Police!
Police who?
Police let me in, it's freezing out here!

Knock Knock!
Who's there?
Oscar
Oscar who?
Oscar silly question, get a silly answer!
Knock knock
Who's there?
Nonya
Nonya who? Nonya business!!
Knock knock 
Who's there? 
Doctor 
Doctor who? 
How did you guess!? 

Knock, knock
Who's there?
Eileen
Eileen who?
Eileen over to tie my shoe

Knock, knock 
Who's there? 
Ken 
Ken who? 
Ken you open the door?! 
Knock Knock
Who's there?
Gorilla
Gorilla who?
Gorilla me a hamburger, I'm starving
Knock knock! 
Who's there?
Boo 
Boo who? 
Please don't cry! 
Knock Knock
Who's there?
Who
Who who?
Who Who - Where's the owl?
Knock knock! 
Who's there?
Time
Time who? 
Time to open the door!
Knock Knock
Who's there?
Snow
Snow who?
Snow good asking me, I don't know!
Knock knock! 
Who's there?
Atch
Atch who? 
Bless you!
Knock knock! 
Who's there?
Me
Me who? 
Don't you don't know who you are?!
Knock knock! 
Who's there?
Water
Water who? 
Water you, a monkey?
Knock knock! 
Who's there?
Wooden shoe
Wooden shoe who? 
Wooden shoe (wouldn’t you) like to know!
Knock knock! 
Who's there?
Shamp
Shamp who? 
Why, does my hair smell?
Knock knock! 
Who's there?
I used
I used who? 
I used to be able to reach the doorbell, but now I can't! 
Knock knock!
Who’s there?
Ya
Ya Who?
YAHOO I won the lottery!
Knock knock! 
Who's there?
House
House who? 
House it going?!
Knock knock! 
Who's there?
Icy
Icy who? 
I see you behind the door!
Knock knock! 
Who's there?
Nobel 
Nobel who? 
No bell so I’ll knock!
Knock knock!
Who's there? 
You 
You who? 
Are you calling me?
Knock knock!
Who's there? 
Alaska. 
Alaska who? 
Alaska one more time...let me in!
Knock knock! 
Who's there?
Stopwatch 
Stopwatch who? 
Stopwatch you’re doing and open this door!!