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: Most amphibians reach maturity at three or ____ years.

SOLUTION: four

PROBLEM: Stereo cameras track the fly's movement in ____ dimensions.

SOLUTION: three

PROBLEM: People often have to wait between three and ____ years for an organ especially for a liver.

SOLUTION:
five