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:
Hydroplanes have ____ or more wetted surface areas.
answer:
two


question:
Sponges are subdivided into ____ classes.
answer:
three


question:
Every human being carries ____ to eight abnormal recessive genes.
answer:

six