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]: Spiders have eight legs and usually have ____ eyes.
[A]: eight


[Q]: Most amphibians reach maturity at three or ____ years.
[A]: four


[Q]: Disaccharides are ____ joined monosaccharides.
[A]:
two