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: Ostriches come in at least ____ breeds.

Answer: two


Question: Human feet bear average ____ to six hundreds tons of weight everyday.

Answer: five


Question: Steroids are lipids whose basic structure is that of ____ connected hydrocarbon rings.

Answer:
four