Answer:
Everyone has me, but nobody can lose me. What am I?
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
I am a rock group that has 4 members, all of whom are dead, one of which was assassinated. What am I?
What bone has a sense of humor?
What has four wheels and flies?
What never gets any wetter no matter how hard it rains?