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]: Most bacteria have one or ____ circular chromosomes.
[EX A]: two

[EX Q]: Some airports have ____ parallel runways.
[EX A]: two

[EX Q]: Most transsexuals report being aware of their condition from the age of ____ to seven.
[EX A]:
four