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.

Fossil fuels come in ____ major forms coal, oil and natural gas.
three

Blood Parrots are a hybrid of ____ Cichlids species.
two

Mothers begin to prepare girls to run a household when they are between seven and ____ years old.

nine