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: Marsupials have ____ vaginas and a double uterus.

Answer: two


Question: Spiders have eight legs and usually have ____ eyes.

Answer: eight


Question: Roots have ____ growth phases, namely primary and secondary growth.

Answer:
two