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: Naiads have ____ caudal filaments and external gills.

Answer: two


Question: Some babies start sleeping through the night on their own around three or ____ months.

Answer: four


Question: Bacteria can have ____ distinctive shapes.

Answer:
three