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.

Dogs are pack animals, and ____ dogs is the minimum number for proper socialization.
five

Most orthoptists work ____ hours a day, four or five days a week.
eight

Nymphs develop through five instars over a period of five to ____ weeks.

six

