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: Marriage is the legal union of ____ people.

A: two
****
Q: Calves are born after a gestation of ____ months.

A: nine
****
Q: All matter exists in ____ dimensional space, both internal and external.

A:
three
****