I've got a bone to pick with you !
Chemistry, because there is lots of acid involved.
They picked random letters out of a hat. C.... eh? N... eh? D....eh?
The carp-ark.
Answer: Because if you only take one, he'll drink all your beer.
Once you're finished with the breasts and thighs, you're left with a greasy box to put your bone in.
To bone up on his schoolwork.
When your a mouse !
A: When you are a mouse!