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: Calves are born after a gestation of ____ months.

SOLUTION: nine

PROBLEM: Some rusts produce up to ____ different spore forms.

SOLUTION: five

PROBLEM: Most voles are less than ____ inches, and have a short, fur-covered tail.

SOLUTION:
three