Answer:
You throw me out when you use me and take me in when you are done. What am I?
What five-letter word becomes shorter when you add two letters to it?
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
I need to be taken before you can have me. What am I?
I am round as an apple, deep as a cup. All the King's horses can't pull me up. What am I?
I flow from the Homerβs mouth when he sees doughnuts.