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]: Reds can benefit from ____ to nine years' aging .
[A]: seven


[Q]: Neurofibromatosis appears in ____ forms.
[A]: two


[Q]: All spiders have eight legs and most have ____ eyes.
[A]:
eight