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: Hares hold their young ____ to ten days longer.

SOLUTION: seven

PROBLEM: Lightning is ____ times hotter than the surface of the sun.

SOLUTION: three

PROBLEM: Grays often hole up for three or ____ days at a time during severe weather.

SOLUTION:
four