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.

[EX Q]: Some species take ____ to two years, or even more.
[EX A]: one

[EX Q]: Water is the only substance on earth found naturally in ____ forms - solid, liquid, and gas.
[EX A]: three

[EX Q]: Sexual maturity is reached at ____ years, and females calve every other year.
[EX A]:
four