instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Water is the only substance on earth that exists naturally in _ states .
answer:
three


question:
Mares generally give birth to one young every _ years.
answer:
three


question:
Condors become sexually mature at about five or _ years of age and mate for life.
answer:

six