I am sure no one can have two things for dinner. what are they?

Solve the following series:
AZ, GT, MN, __, YB

I am white when I am dirty, and black when I am clean. What am I?

Decode this picture on T-Shirt and tell what it says ?

What breaks yet never falls, and what falls yet never breaks?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What can go through glass without breaking it?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

If you say my name, I will no longer exist. What am I?

I make two people out of one. What am I?