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

[EX Q]: Intramural football consists of _ leagues.
[EX A]: three

[EX Q]: Flytraps spin when _ creatures can be infected.
[EX A]: no

[EX Q]: Doctors use _ blood tests to measure the amount of iron in the body.
[EX A]:
three