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 butterflies live only two to ____ weeks.

SOLUTION: four

PROBLEM: Spiders have eight jointed legs and ____ body parts.

SOLUTION: two

PROBLEM: Tobacco kills ____ million people annually.

SOLUTION:
four