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.

[EX Q]: Most people stay three or four years, sometimes five or ____ years.
[EX A]: six

[EX Q]: Comprehension is the second of the ____ elements of the informed consent process.
[EX A]: three

[EX Q]: Human insulin consists of ____ different peptide chains.
[EX A]:
two