TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Some school boards have _ teacher-librarians at all.

SOLUTION: no

PROBLEM: Pangolins walk on all _ of their stout limbs, which are adapted for digging.

SOLUTION: four

PROBLEM: Most intestinal worms take three to _ weeks for maturation from their larval stages into adults.

SOLUTION:
four