问题
单项选择题
When was the United States transformed into a truly industrial country a. In the twentieth century. b. At the turn of the last century. c. During the Civil War. d. Between the end of the Civil War and the mm of the 20th century.
答案
参考答案：D
解析：[听力原文]When was the United States transformed into a truly industrial country
[分析]： 细节信息。 题干：美国什么时候转变为一个真正的工业国家 根据原文“…as the United States was transformed into a truly industrial nation between the end of the Civil War and the turn of the 20th century”，所以选d。