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: Violets usually have ____ sepals at the base and have five petals.

SOLUTION: five

PROBLEM: Collages can have two or ____ layers.

SOLUTION: three

PROBLEM: Competition exists when the niches of ____ species overlap.

SOLUTION:
two