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.

Beavers live in families that include an adult pair and ____ to three years worth of offspring.
one

Fire occurs any time ____ elements are present - fuel, heat, oxygen and the chemical chain reaction.
four

Some men have ____ photographs of themselves as children.

no