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]: Gorillas are sexually mature at ____ to nine years of age.
[EX A]: six

[EX Q]: Plants produce seed at ____ years of age.
[EX A]: eight

[EX Q]: Cutaneous lesions develop ____ days after the onset of the attack.
[EX A]:
three