TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Infertility affects one in _ couples and affects both men and women.

SOLUTION: seven

PROBLEM: Cichlids are popular in the aquarium hobby for a _ reason.

SOLUTION: four

PROBLEM: Most ovarian cysts go away on their own in one to _ months without causing any problems.

SOLUTION:
three