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]: Elderberry supplements seem to have few risks when used daily for up to ____ days.
[A]: five


[Q]: Cottonmouths have a lifespan of less than ____ years.
[A]:
ten