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]: China has about one in ____ of all smokers in the world.
[A]: four


[Q]: Onions are of ____ general types.
[A]: two


[Q]: Women have ____ ovaries.
[A]:
two