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.

[Q]: Some babies start sleeping through the night on their own around three or ____ months.
[A]: four


[Q]: Cytochrome oxidase consists of two cytochromes and ____ copper atoms.
[A]: two


[Q]: Most darters are less than ____ inches long.
[A]:
four