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:
Lightning is ____ times hotter than the surface of the sun.
answer:
three


question:
Water is the only substance on earth found naturally in ____ forms - solid, liquid, and gas.
answer:
three


question:
Tobacco causes ____ in three cancers deaths world-wide.
answer:

one