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: Most newborns nurse every one to ____ hours, even at night.

Answer: three


Question: Bond angles The bond angle defined by ____ atoms is calculated.

Answer: three


Question: Fungi also participate in ____ important symbiotic relationships.

Answer:
two