Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Q: Exposure can occur in ____ general ways, ingestion, skin contact and inhalation.

A: three
****
Q: Naiads have ____ caudal filaments and external gills.

A: two
****
Q: Grasshoppers have ____ bulky eyes on top of the head.

A:
two
****