Answer:
What is bought by the yard by is worn by the foot?
What do you fill with empty hands?
The more holes you cover the lower it goes.
What is weightless but takes two people to hold it?
Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?