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: Many biologists believe the sandhill has been virtually unchanged for ____ million years.

A: nine
****
Q: Airplanes still fly four to ____ times faster than zeppelins.

A: five
****
Q: Most starfish have ____ arms, but a few species have more, as many as fifty arms.

A:
five
****