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.

Chromatography is unique because of ____ reasons.
three

Deer mice have four toes on the forefeet and ____ toes on the hind feet.
five

Shigellosis usually resolves in ____ to seven days.

five