Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Philosophy has ____ axioms since it is simply what reason knows by means of concepts.
no

China has about one in ____ of all smokers in the world.
four

Steroids have a basic structure of ____ fused rings of carbon atoms.

four