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: Body temperature attains ambient levels within four to ____ hours.

Answer: six


Question: Crustaceans have ____ pairs of antennae.

Answer: two


Question: All sloths have ____ toes.

Answer:
three