Knock knock. Who's there? Sew

Sew who? Sew glad you asked, it's a tailor-made joke!

Knock knock. Who's there? Mango.

Mango who? Mango-nificent to meet you!

Knock knock. Who's there? Wheat

Wheat who? Wheat you waiting for, let me in

Knock knock. Who's there? Dough.

Dough who? Dough-n't worry, I knead to come in.