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.

[EX Q]: Erosion is divided into ____ main categories, water and wind.
[EX A]: two

[EX Q]: Nymphs go through ____ instars and a pupa stage before reaching adulthood.
[EX A]: three

[EX Q]: Arachnids are terrestrial arthropods, which have simple eyes and ____ pairs of legs.
[EX A]:
four