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: Humans grow with ____ sets of teeth.

A: two
****
Q: Carbon is able to bond with up to ____ other elements.

A: four
****
Q: Beta diversity relates to ____ pools relative to each other.

A:
two
****