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]: Humans have two lungs, each fed by ____ bronchus.
[A]: one


[Q]: Flat screens come in ____ varieties, analog and digital.
[A]: two


[Q]: Cubs stay with their mothers for up to ____ years.
[A]:
three