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

[EX Q]: Seasons mean very little in our world of _ hemispheres.
[EX A]: two

[EX Q]: Most people have _ kidneys.
[EX A]: two

[EX Q]: Saliva comes from _ pairs of salivary glands, plus many smaller glands.
[EX A]:
three