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Questions 11～13 are based on the following passage. You now have 15 seconds to read questions 11～13. Whom was probably the wheel invented by

A．A group of early hunters.
B．The first man on earth.
C．A great prehistoric thinker.
D．The man who made the first cart.

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单项选择题

Questions 11～13 are based on the following passage. You now have 15 seconds to read questions 11～13. Whom was probably the wheel invented by 您的浏览器不支持 audio 元素。