TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Pancreatic juice is of _ types.

SOLUTION: two

PROBLEM: Essential oils have a non-toxic, residual effect of up to five months from just _ application.

SOLUTION: one

PROBLEM: Prairie dogs have only one litter of _ pups a year.

SOLUTION:
five