It is hinted that the reason that many students fail in college is that ______.

单项选择题The expression ... barking up the wrong tree (Par

单项选择题Why does the author mention Alfred Stieglitz

单项选择题It can be inferred from the passage that European art trends probably affected United States art most during ______.

单项选择题On what country is this selection based

单项选择题What had been taking place during the time of the Roses