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.

White men are almost ____ times more likely to develop cancer of the testicles than are black men.
five

Fish kills can occur when oxygen is less than ____ ppm.
three

Songbirds sing the most about one-half hour before sunrise to ____ hours after sunrise.

four