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]: Taiwanese law permits a jail term of up to ____ years for spreading computer viruses.
[A]: three


[Q]: Some rusts produce up to ____ different spore forms.
[A]: five


[Q]: Protons contain ____ up quarks and one down quark.
[A]:
two