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.

[EX Q]: Copper has ____ naturally occurring isotopes.
[EX A]: two

[EX Q]: Team handball is played with seven players per side, six court players, and ____ goalkeeper.
[EX A]: one

[EX Q]: Naiads have ____ caudal filaments and external gills.
[EX A]:
two