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 amphibians reach maturity at three or ____ years.

Answer: four


Question: Colostrum is bright yellowish thick milk secreted in the first ____ to six days after birth.

Answer: three


Question: Nucleotides only require ____ phosphorylations.

Answer:
two