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: Amphibians are the first true vertebrates with ____ limbs.

A: four
****
Q: Rabbinic literature is made up of ____ major kinds of works.

A: five
****
Q: Fusion energy is released when ____ small atoms merge together.

A:
two
****