单项选择题
From the last paragraph, we many conclude that （）
A．Americas is a democratic country B．Americas newspapers are responsible C．the American press has a good reputation D．the Watergate Affair has been exposed
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 （）
单项选择题 What is the main purpose of the passage（）
