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: All birds have ____ legs with four toes each.

Answer: two


Question: Conversations overlap, especially when more than three people try to talk in ____ room.

Answer: one


Question: Embryos hatch in ____ months.

Answer:
two