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: Raindrops produce ____ types of sound underwater.

A: two
****
Q: Fire occurs any time ____ elements are present - fuel, heat, oxygen and the chemical chain reaction.

A: four
****
Q: Most Latin verbs have ____ principal parts .

A:
four
****