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 countries require passports to be valid for ____ months after expiry of the visa.
[A]: six


[Q]: Parallel coordinates use ____ or more parallel axes.
[A]: two


[Q]: Double bond means ____ pair of electrons are shared.
[A]:
two