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: Teething begins for most babies around ____ to six months.

SOLUTION: four

PROBLEM: Milk is a good source of all ____ nutrients.

SOLUTION: three

PROBLEM: Photons have momentum but ____ mass or electrical charge.

SOLUTION:
no