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: Neutrinos are particles with almost ____ mass and no electric charge.

A: no
****
Q: Some nurseries only take children aged ____ years and over.

A: two
****
Q: Young birds leave the nest after three or ____ months.

A:
four
****