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]: Most insects have one or ____ pairs of wings.
[EX A]: two

[EX Q]: Some children start asking questions when they're ____ or five years old.
[EX A]: four

[EX Q]: Hurricanes have ____ main parts.
[EX A]:
two