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:
Kayak paddles have ____ blades, canoe paddles have one.
answer:
two


question:
Ozone is formed of ____ atoms of oxygen.
answer:
three


question:
Oil spills account for only about ____ percent of the oil entering the oceans.
answer:

five