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: Humans have two lungs, each fed by ____ bronchus.

SOLUTION: one

PROBLEM: Wolves have ____ different types of fur.

SOLUTION: two

PROBLEM: Lead poisoning is especially dangerous in children ages ____ months to six years old.

SOLUTION:
six