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: Food waste is transformed into soil-like humus in three to ____ days.

Answer: seven


Question: Hyacinths have a wingspan reaching nearly ____ feet.

Answer: four


Question: Oxygen exists in all ____ forms - liquid, solid, and gas.

Answer:
three