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

Answer: three


Question: Knee arthroscopy is used basically in ____ ways.

Answer: three


Question: Women have two X chromosomes, whereas men have ____ copy.

Answer:
one