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

[EX Q]: Rabbits have a total of ____ teeth rather than four, as is characteristic of rodents.
[EX A]: six

[EX Q]: Food chains vary in length from ____ to six or more levels.
[EX A]:
three