Answer:
What's made of water but if you put it into water it will die?
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
I am asleep when you are awake I am awake when you fall asleep. I can fly but no feathers to aid my flight.
I am put on the table, cut, but never eaten. What am I?
When you buy me I am costly, but the only use I have is hanging only. What 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.