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: Photosynthesis has ____ main sets of reactions.

SOLUTION: two

PROBLEM: Most dens are oval shape, six to ____ feet long and about six feet in height and width.

SOLUTION: nine

PROBLEM: Orangutans are the most at risk of the world's ____ species of apes.

SOLUTION:
six