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.

Crustaceans have ____ pairs of antennae.
two

Most ducks acquire breeding plumage in the fall, ____ or seven months before other birds.
six

Geckos are small lizards, usually about ____ to six inches long.

three