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: Orchestra conductors live ____ to seven years longer than is usual in their societies.

SOLUTION: three

PROBLEM: Water is moved underneath the body by most or all of the ____ arms.

SOLUTION: eight

PROBLEM: Pinnipeds have a streamlined, torpedo-shaped body, with all ____ limbs modified into flippers.

SOLUTION:
four