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.

Most insects have one or ____ pairs of wings.
two

Neutrinos are particles with almost ____ mass and no electric charge.
no

Interdigital glands are present on all ____ feet, and are slightly larger on the front feet.

four