Answer:
Part carbon, part water, I am poison to the fishes. Many falsely claim my name, I am the pause that refreshes. What am I?
When it comes to me, you go on red and stops on green. What am I?
What five-letter word becomes shorter when you add two letters to it?
kings and queens may cling to power and the jesters may have their call. I am the most common but I can rule them all.
I have cities with no people, forests with no trees, and oceans with no water. What am I?
What begins and has no end? What is the ending of all that begins?