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: Aardvarks have ____ toes on the front feet and five toes on their back feet.

SOLUTION: four

PROBLEM: Seismologists offer ____ major theories for the occurrence of large, deep earthquakes.

SOLUTION: three

PROBLEM: Otters mature sexually by ____ years of age.

SOLUTION:
two