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: Light chains exist in ____ classes, lambda and kappa.

A: two
****
Q: Girls have ____ ovaries.

A: two
****
Q: Currents are extremely variable, from nothing to a fast, steady flow of ____ knots or more.

A:
three
****