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: Marshes are shallow wetlands less than ____ meters deep.

A: two
****
Q: Most cats have five toes on each front paw, but only ____ toes on each back paw.

A: four
****
Q: Mares normally give birth to their first foal when they are between three and ____ years of.

A:
six
****