In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Rainforests cover less than _ percent of the Earth's surface.

A: two
****
Q: Cormorants are monogamous and breed in colonies of up to _ thousand pairs.

A: three
****
Q: Parvo affects dogs of any age, but is most devastating to puppies less than _ months of age.

A:
five
****