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: Irrigated land is almost ____ times as productive as rainfed cropland.

SOLUTION: three

PROBLEM: World population continues to rise, even as a few countries move toward ____ growth.

SOLUTION: zero

PROBLEM: Most sea spiders have ____ pairs of legs.

SOLUTION:
four