Answer:
I am a rock group with four members. All dead one was assassinated.
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
I run around the streets all day. Under the bed or by the door I sit at night, never alone. My tongue hangs out, waiting to be fed during the day. What am I?
I run up and down the stairs without moving
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.