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:
Plants have roots for ____ main reasons.
answer:
two


question:
Nitric oxide serves ____ main functions in the body.
answer:
three


question:
Some babies sleep through by age ____ weeks.
answer:

six