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: Some alternative antibiotics require ____ doses per day for ten days.

A: three
****
Q: All grays have ____ saturation.

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

A:
four
****