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]: Most bioluminescence is blue for ____ reasons.
[A]: two


[Q]: Binary distillation is a separation of only ____ chemicals.
[A]: two


[Q]: Lobsters have eight walking legs and ____ legs bearing claws.
[A]:
two