Answer:
hide me from your parents if you have done bad academically this year.
What force and strength cannot get through I with my unique teeth can do.
I am alive without breath and cold as death. I am never thirsty but always drinking. What am I?
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
I go up and never come down no matter how hard you wish. As I get higher, more wrinkles crawl on to the face. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.