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.

Gorillas are sexually mature at ____ to nine years of age.
six

Some plants even have ____ leaves or small seasonal leaves that grow after it rains.
no

Leopard geckos reach sexual maturity at the age of one to ____ years.

three