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.

[Q]: Some plants even have ____ leaves or small seasonal leaves that grow after it rains.
[A]: no

[Q]: Cytochrome oxidase consists of two cytochromes and ____ copper atoms.
[A]: two

[Q]: Embryos hatch in ____ months.
[A]:
two