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: Spiders have eight jointed legs and ____ body parts.

SOLUTION: two

PROBLEM: Differentiation is caused by the energy going in ____ directions.

SOLUTION: two

PROBLEM: Quadrupeds are animals with ____ feet, such as cows.

SOLUTION:
four