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: Hydroplanes have ____ or more wetted surface areas.

Answer: two


Question: Scientists divide the mosses into ____ groups .

Answer: eight


Question: Hedgehogs give birth to one to ____ babies which are born with the spines just below the skin.

Answer:
seven