Answer:
What ship has no captain but two mates?
I travel the world and I am drunk constantly. Who am I?
Small, containing light, You'll need it in the dark, It will provide that spark, and shine into the night. Will light up any pyre, 'Cause it can help make a fire.
Man's most important invention.
I am your mother's brother's only brother in law. Who am I?
When is it bad luck to see a black cat?