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.

Black widows mature in two to ____ months.
four

Cellulose contains nothing that is considered hazardous, and carries ____ hazardous warning messages.
no

Corn can produce a new leaf every ____ days during optimal growth.

three