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: Elephants also have four molars, ____ on the top and one on the bottom on both sides of the mouth.

A: one
****
Q: Amphibians have ____ legs, and often look like reptiles.

A: four
****
Q: Neutrinos are particles with almost no mass and ____ electric charge.

A:
no
****