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]: All Jovian planets have rings around their equators and at least ____ moons.
[EX A]: eight

[EX Q]: Ferrets normally tremble for ____ reasons.
[EX A]: two

[EX Q]: Some fishes have ____ pairs to a single vertebra.
[EX A]:
two