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 lemmings are ____ to six inches in length and weigh less than four ounces.
three

Macular degeneration comes in ____ forms, dry and wet.
two

Most eels have ____ scales and are protected by a layer of slippery mucus.

no