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]: Biological islands are of ____ general types, geographical and ecological.
[EX A]: two

[EX Q]: Blood Parrots are a hybrid of ____ Cichlids species.
[EX A]: two

[EX Q]: Smoking can speed up onset by ____ years.
[EX A]:
two