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: Maps are ____ dimensional representations of the earth's surface.

A: two
****
Q: Roaches have two forewings and ____ hind wings.

A:
two
****