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]: Females usually reach sexual maturity at about four years of age, males at about ____ years.
[A]: six


[Q]: Young bandicoots become independent at about ____ months and are sexual mature at about five months.
[A]: four


[Q]: Photosynthesis has ____ main sets of reactions.
[A]:
two