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: Copper has ____ naturally occurring isotopes.

SOLUTION: two

PROBLEM: Young bees spend the first ____ to three weeks of their lives carrying out functions within the hive.

SOLUTION: one

PROBLEM: Some people say that one dose of poison can kill ____ full grown men.

SOLUTION:
ten