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: Soy products contain ____ known classes of anti-cancer agents, including phytoestrogens.

SOLUTION: five

PROBLEM: Body temperature attains ambient levels within four to ____ hours.

SOLUTION: six

PROBLEM: Average litters contain ____ to six kittens.

SOLUTION:
three