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: Calcite makes up ____ well known rocks limestone and marble.

SOLUTION: two

PROBLEM: Gloves have ____ ridges or crevices in which the bacteria can hide.

SOLUTION: no

PROBLEM: Plants fall into two groups with ____ types of photosynthesis.

SOLUTION:
two