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]: Most amphibians reach maturity at three or ____ years.
[A]: four


[Q]: Perennials are plants that live more than ____ growing seasons.
[A]: two


[Q]: Mothers typically have from ____ to six cubs, which are born blind and toothless.
[A]:
one