Answer:
I have three feet but I cannot walk. What am I?
What word becomes shorter when you add two letters to it?
I have an eye, but I can't see. I usually have to work with something in my eye. What am I?
I'm written with two letters, said with one and seen with two. What am I?
I am a word of letters three. Add two and fewer there will be. What word am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.