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]: Most insects have two antennae, six legs, and ____ wings.
[A]: four


[Q]: Cellulose contains nothing that is considered hazardous, and carries ____ hazardous warning messages.
[A]: no


[Q]: Cleavage is perfect in ____ directions, forming rhombohedrons.
[A]:
three