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]: Lung disease is America's number ____ killer, responsible for one in seven deaths.
[A]: three


[Q]: Female fish produce an average of ____ to six hundred thousand eggs.
[A]:
five