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 people become sick ____ to seven days after infection.

Answer: two


Question: Most people stay three or four years, sometimes five or ____ years.

Answer: six


Question: USGS maps use symbology to distinguish ____ classes of roads plus trails.

Answer:
five