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: Smoking causes lung cancer in ____ ways.

SOLUTION: two

PROBLEM: Earth is the third planet from the Sun in our solar system, which includes ____ other planets.

SOLUTION: seven

PROBLEM: All insects have three pairs of legs and ____ body regions, head, thorax, and abdomen.

SOLUTION:
three