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

[EX Q]: Cortisone drops only every hours _ instead of one.
[EX A]: two

[EX Q]: Roundworms are fairly large worms that can grow to be _ or five inches long.
[EX A]: four

[EX Q]: Scientists divide the mosses into _ groups .
[EX A]:
eight