单项选择题
According to the passage, who has the greatest degree of control in an administered system（）
A．Individual households. B．Small businesses. C．Major corporations. D．The government.
单项选择题 According to the passage, a barter economy can lead to （）
单项选择题 What is the main purpose of the passage（）
单项选择题 Which of the following is NOT mentioned by the author as a criterion (标准) for determining a person's place in a traditional society（）
