a. event通常指具有很大影响、意义大的事件或运动会的比赛项目。如: Can you remember the events which happened in the 1960s? The Autumn Uprising is a great event in China's histroy. There are 300 different events in the Olympic Games. b. matter 意思为“毛病”、“问题”,通常指“要注意的事情”。如: What's the matter with you ? It's a different matter. c. affair 指已经发生或必须去做的事情,通常用复数形式指“事务”“事 态”如:the world affairs, foreign affairs. d. thing 是指“事情”“事务”“东西”的意思,指大事、小事、好事、坏事,但一般不用来指专门的事务。如: To say is one thing but to do is another. Bring your swimming things. 另外还有business一词,作“事情”解释,一般指“公事”“正事”“商业事务”,强调任务,职务等指派的工作。如: He is on business. It's none of your business.本回答被提问者和网友采纳