试题题干
The incident that made the United States formally declare war against the Axis Powers was （）.
参考答案
正确答案：
试题解析
使美国正式向轴心国宣战的事件是1941年珍珠港的爆炸事件。
The incident that made the United States formally declare war against the Axis Powers was （）.
使美国正式向轴心国宣战的事件是1941年珍珠港的爆炸事件。