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]: Brook stickleback have prominent mouths, large eyes and ____ to six spines on their backs.
[EX A]: four

[EX Q]: Mosquitoes can develop in any stagnant water that lasts more than ____ days.
[EX A]: four

[EX Q]: Turtles engage in ____ types of activities causing three forms of destruction.
[EX A]:
three