TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Phosphates are made of _ phosphorus atom surrounded by four oxygen atoms.

SOLUTION: one

PROBLEM: Tourism is among the _ largest industries in each of the western states.

SOLUTION: three

PROBLEM: Alcoholism affects _ elderly men for every one woman.

SOLUTION:
five