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]: Fossil fuels come in ____ major forms coal, oil and natural gas.
[A]: three


[Q]: Teething begins for most babies around ____ to six months.
[A]: four


[Q]: Emulsions are stable mixtures of ____ immiscible liquids.
[A]:
two