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]: Every isometry is the composition of one, two, or ____ reflections .
[A]: three


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


[Q]: Gymnosperms produce ____ kinds of spores.
[A]:
two