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:
Today there are ____ mating pairs.
answer:
four


question:
Orchestra conductors live ____ to seven years longer than is usual in their societies.
answer:
three


question:
Massive stars explodes after only a few ____ million years as enormously energetic supernovae.
answer:

ten