Knock! Knock!Who's there?Wendy.Wendy who?Wendy bell works again I won't have to knock anymore.
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Water those plants or they’re going to die!
Alpaca the suitcase, you load up the car!
Dozen anyone want to let me in?
Knock! Knock!Who’s there?Heidi.Heidi who?Heidi ‘cided to come over to play!
That’s impossible. Opportunity doesn’t come knocking twice!
Leaf Me Alone!
Knock! Knock!Who’s there?From.From who?Actually, grammatically speaking you should say “from whom.”
Luke through the keyhole to see!