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: Tobacco companies account for ____ of the five biggest billboard advertisers in the country.

A: four
****
Q: Hearing is acute by three or ____ weeks and kittens learn to determine what sounds mean.

A: four
****
Q: Protons are known as baryons, which means that they are made of exactly ____ quarks.

A:
three
****