Answer:
Big as a saucepan, deep as a cup, Even a river can't fill it up. What is it
What do you have in December that you don't have in any other month?
A canvas full of stars.
What word becomes shorter when you add two letters to it?
I occur twice in eternity. And I'm always within sight.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.