A．Four years.
B．Five years.
C．Three years.
D．Six years.

A.Four
B.
B．Five
C.
C．Three
D.
D．Six

【参考答案】

A
解析：信息明示题。文章第三段指出，Civil War，which lasted from 1861 to 1......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)