instruction:
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.
question:
Water consists of ____ hydrogen and one oxygen atom.
answer:
two


question:
Knee arthroscopy is used basically in ____ ways.
answer:
three


question:
Differentiation is caused by the energy going in ____ directions.
answer:

two