Answer:
I am round. I have only one line. Circle is not my name indeed. What am I?
I am black of eye and bright of hair. I fast into the ground and follow my lord as he races around the world. What am I?
You used to come to me for all sorts of information and knowledge before the internet was born
I shave several times a day, yet I still have a beard. What am I?
What word has kst in the middle, in the beginning, and at the end?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.