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: Most amphibians reach maturity at three or ____ years.

A: four
****
Q: Inflorescence is a condensed cyme with five to ____ flowers and axillary in position.

A: ten
****
Q: Microtubular systems contain at least ____ a-tubulin isoforms.

A:
three
****