Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

It is always ahead of me yet I can never see it. What is it?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What do you answer even though it never asks you questions?

What can you catch but never throw?

You can see it everyday, But cannot touch it at will. What is it?

What is so fragile that saying its name breaks it?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?