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]: Photons have momentum but ____ mass or electrical charge.
[EX A]: no

[EX Q]: Marshes are shallow wetlands less than ____ meters deep.
[EX A]: two

[EX Q]: Cells have ____ kinds of nuclei.
[EX A]:
two