What am I?

Everyone has it, but no one can loose it. What am I?

Guided, I am scraping along, leaving behind my snowwhite dust against that which I am scraping, for when I am scraping, I must. What am i?

Like a river I flow, and you’re happy I do in vain. There is no escaping from my course, without causing pain. What am I?

Hide me from your parents if you have done bad academically this year. What am I?

Riddles and Answers