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.

Rattlesnakes breed only every ____ to three years.
two

Measles usually begin with cold-like symptoms followed by a high fever and a rash ____ days later.
three

Ostriches have only ____ toes on each foot.

two