Answer:
I am the key that is the hardest to turn
I row quickly with four oars but never comes out from under my own roof.
I contain six letters minus one and you got twelve.
Package beneath a tree, inside a tasty treat. Keep it for a month, the taste is just as sweet. What am I?
I'm a kind of cup that doesn't hold water, but makes a lot of noise repeatedly. What am I?
What language does a billboard speak?