Riddles

I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost everybody.



There were five men going to church and it started to rain. The four that ran got wet and the one that stood still stayed dry. How is this possible?



If you cross out all unnecessary letters in the following string of letters, a logical sentence will remain. Can you see it?

AALLLOUGNINCEACELSSSEANRYTELNETCTEERS