TASK DEFINITION: Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.
PROBLEM: Most psychologists agree that the big ____ personality traits are stable across the life-span.

SOLUTION: five

PROBLEM: Babies can be exclusively breast-fed for their first ____ months of life.

SOLUTION: six

PROBLEM: Mood changes such as irritability, anger and depression usually settle within three or ____ weeks.

SOLUTION:
four