单项选择题
According to the text, American newspapers （）
A．have a limited range of information B．attract readers of all political groups C．are compared with television all the time D．mainly concern state news
单项选择题 From the last paragraph, we many conclude that （）
单项选择题 According to the passage, who has the greatest degree of control in an administered system（）
单项选择题 According to the passage, a barter economy can lead to （）
