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: International mail consists of ____ categories of mail.

SOLUTION: three

PROBLEM: Neuroblasts delaminate in five waves spanning approximately ____ hours.

SOLUTION: three

PROBLEM: Colon cancer has ____ main symptom complexes.

SOLUTION:
four