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: Some women experience a labor of three to ____ days.

A: five
****
Q: Penguins have ____ seasons in their year, as follows.

A: four
****
Q: Saliva consists of ____ fluids, 'mucous' and 'serous'.

A:
two
****