Answer:
Why did the computer keep sneezing?
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
What comes once in a minute twice in a moment but never in a thousand years?
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
Lives in winter, dies in summer, and grows with its roots upward. What is it?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.