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: Exposure can occur in ____ general ways, ingestion, skin contact and inhalation.

A: three
****
Q: Mature birds boast a wing span of ____ feet.

A: six
****
Q: Most surgeons allow patients to wash their hair after ____ days.

A:
three
****