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: Human gestation is divided into three trimesters of ____ months each.

A: three
****
Q: Dogs can begin gundog training as early as ____ months of age.

A: six
****
Q: Females give birth to one, occasionally two, large babies, after a pregnancy of six to ____ months.

A:
seven
****