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]: Kittens take solid food within ____ months.
[A]: two

[Q]: Phylogenetic analyses confirm ____ mitochondrial mallard clades.
[A]: two

[Q]: Meta attack leads to an arenium ion with only ____ resonance structures.
[A]:
three