In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Monarch caterpillars have _ pairs of tentacles.
[EX A]: two

[EX Q]: District judges are attorneys who are elected on non-partisan ballots for terms of _ years.
[EX A]: six

[EX Q]: Wolves can go for _ to four days between meals.
[EX A]:
three