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]: Penile cancer occurs almost exclusively in the uncircumcised male at a rate of ____ per million.
[A]: eight


[Q]: Mental illness affects approximately ____ in four people throughout their lifespan.
[A]:
one