In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Domestic violence occurs in _ in four families in Australia.
[EX A]: one

[EX Q]: Most children overcome bed wetting between the ages of _ and ten.
[EX A]: six

[EX Q]: All people have _ copies of most genes.
[EX A]:
two