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.

[EX Q]: Early childhood refers to the time period between birth and ____ years of age.
[EX A]: eight

[EX Q]: Human gestation is divided into three trimesters of ____ months each.
[EX A]: three

[EX Q]: Most skink species have short legs that are well-formed and a few have ____ legs at all.
[EX A]:
no