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: Plants grow up to ____ feet tall and spread to about three feet.

SOLUTION: three

PROBLEM: Numbers can be positive or ____ only.

SOLUTION: zero

PROBLEM: Tadpoles transform within ____ months, becoming mature adults within one year.

SOLUTION:
three