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]: Respiratory therapists complete two to ____ years of education.
[A]: four


[Q]: Ozone leaves ____ by-products except pure oxygen.
[A]: no


[Q]: Autism affects ____ major dimensions of life.
[A]:
three