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]: Marine biologists have ____ theories on why whales breach.
[EX A]: two

[EX Q]: Traffic lights have ____ colors.
[EX A]: three

[EX Q]: Suckers usually have ____ or more comb-like pharyngeal teeth, one row on each pharyngeal arch.
[EX A]:
ten