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]: Some bird feeders have ____ perches at all, but neither do tree trunks.
[A]: no


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


[Q]: Most smokers try to quit at least five or ____ times before they succeed, researchers say.
[A]:
six