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]: Black widows mature in two to ____ months.
[A]: four


[Q]: Some clouds are so thick and dense that ____ stars can shine through.
[A]: no


[Q]: High voltage breaks the ____ atoms of oxygen apart.
[A]:
two