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.

Q: Sedge wrens are listed as endangered by all ____ states.

A: three
****
Q: Cytochrome oxidase consists of two cytochromes and ____ copper atoms.

A: two
****
Q: Gestation is approximately ____ year, and calves are suckled for nine months to twelve months.

A:
one
****