Answer:
Goes over all the hills and hollows, Bites hard, but never swallows.
I always have to work with something in my eye. What am I?
I have two eyes in the front and a lot of eyes on my tail. What am I?
I am heavy forward but backward I'm not.
I fill a room but take no space. What am I?
A word of five letters, Upside down is the same, A shark does this, But itβs not to blame. What is the word?