instruction:
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.
question:
China has about one in ____ of all smokers in the world.
answer:
four


question:
Traffic lights have ____ colors.
answer:
three


question:
Pacific salmon leave their home stream, swim out to sea and return ____ to six years later to spawn.
answer:

one