Answer:
What is so fragile that saying its name breaks it?
Two people are born at the same moment, but they don't have the same birthdays. How could this be?
I am what remains when nothing is left.What am I?
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
They belong to me; they belong to you; They can make you feel happy or make you feel blue; They never end until the day you do.
I always have to work with something in my eye. What am I?