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]: Dicots are plants that have ____ cotyledons.
[A]: two


[Q]: Groundhogs usually have ____ separate dens.
[A]: two


[Q]: Trees begin to form fruiting buds at around ____ years of age.
[A]:
three