如何区分这三个词？
accident 往往指“偶然的事故”，尤其是不幸的事故：
-
I had an accident when I was driving to work — my car hit a tree. 我开车上班时出了事故——我的汽车撞在树上了。
-
There has been a road accident. 发生了一起交通事故。
incident 则是指“不好的或异乎寻常的事件”，可能是大事件，也可能是小事件。
-
Josie told us about a funny incident at school, when her teacher fell in the pond! 乔西告诉我们一件学校里可笑的事，她的老师掉进池塘里了！
-
There was a strange incident in the supermarket today. 今天,超级市场里发生了一件怪事。
-
The July 7th Incident of 1937 is an important one in the history of China. 1937 年的七七事变是中国历史上的一件大事。
event 则是指“重大的历史事件”或日常生活中的重要事件：
-
social/sporting event 社会重大事件/体育比赛
-
Hong Kong's return to China is one of the chief events of 1997. 香港回归中国是1997年的大事之一。
-
That night a terrible event occurred. 那天夜里发生了一件可怕的事。
The border ____ is worthy of special attention.
A. incident B. accident C. happening D. occurring