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

[EX Q]: Prostate cancer has _ symptoms in the early stages.
[EX A]: no

[EX Q]: Mice are fertile animals because female mice come into heat every _ to five days.
[EX A]: four

[EX Q]: Cholesterol is a waxy substance found in _ places.
[EX A]:
two