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]: Amphibians are the first true vertebrates with ____ limbs.
[EX A]: four

[EX Q]: Some species live for as little as ____ months.
[EX A]: six

[EX Q]: Human ear has ____ important parts.
[EX A]:
three