Riddles to answer! (All questions should be answered)

1. What has 4 legs that cannot walk/run?
2. What has 21 eyes but cannot see?
3. What teaches but doesn't talk?
4. I am important but never important in love what am I?
5. People buy me to eat but never eats me what am I?
6. What kind of table does not have legs?
7. When someone speaks I speak back what am I?
8. I can't fly but I have bigs wings what am I?
9. What has 88 keys but has no door?
10. I'm not a shiny object but I shine brighter what am I?

(For some people who need points but please also answer all questions even if it's not right, you still tried your best!)