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

[EX Q]: Several countries appear to have _ islands at all.
[EX A]: no

[EX Q]: Most crops require at least _ to eight hours of full sun a day to thrive.
[EX A]: six

[EX Q]: Domestic violence affects at least _ out of every four American families.
[EX A]:
one