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

SOLUTION: nine

PROBLEM: Warthogs also sport ____ sharp tusks.

SOLUTION: four

PROBLEM: Opossums have high infant mortality and short lifespans, averaging ____ to four years.

SOLUTION:
one