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]: Colostrum is bright yellowish thick milk secreted in the first ____ to six days after birth.
[A]: three


[Q]: Babies crawl into a pouch on the mother's belly and stay there ____ months.
[A]: four


[Q]: Full immunity occurs about four weeks after injection and lasts for about ____ months.
[A]:
five