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.

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

Dholes are highly social animals and live in packs of about ____ dogs.
ten

Female waterbucks reach maturity at the age of ____ years.
three