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

[EX Q]: Roaches have two forewings and _ hind wings.
[EX A]: two

[EX Q]: Some school boards have _ teacher-librarians at all.
[EX A]: no

[EX Q]: Centipedes can measure from one to _ inches in length.
[EX A]:
six