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: Cognitive changes are probably equivalent to about a three to ____ month delay in progression.

Answer: six


Question: Narwhals have ____ teeth in their upper jaw.

Answer: two


Question: Carbon atoms occur in ____ different masses, or isotopes.

Answer:
three