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]: Water consists of ____ hydrogen and one oxygen atom.
[A]: two


[Q]: Earth is the third planet from the Sun in our solar system, which includes ____ other planets.
[A]: seven


[Q]: Knowledge interacts with consciousness on ____ levels.
[A]:
two