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]: Girls have ____ ovaries.
[A]: two


[Q]: Gloves have ____ ridges or crevices in which the bacteria can hide.
[A]: no


[Q]: Sponges are made of ____ simple and independent cells.
[A]:
four