instruction:
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.
question:
Most amphibians reach maturity at three or ____ years.
answer:
four

question:
Most aquatic life does well in water with oxygen concentrations of ____ parts per million.
answer:
nine

question:
Butterflies have ____ antennae with clubs at the end.
answer:
two