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]: Fish kills can occur when oxygen is less than ____ ppm.
[A]: three


[Q]: Psychology is founded on ____ false premises that are all humanistic from the core.
[A]: eight


[Q]: Gestation is two to ____ months in most species.
[A]:
three