Come up 是什么意思？临时有事，别写 I have affairs

Come up 可以描述任务或问题突然出现，也可以表示某个话题、问题在交谈中被提起。Something has come up 常用于解释为什么无法赴约：临时有事需要处理。谈到会上提出的问题，可以说 The question came up at the meeting。

something (has) come up; come up at/in + meeting/conversation; come up with + idea

• Sorry, something has come up at work, so I'll be about an hour late.
• Your name came up at the meeting today; the boss wants you on the new project.
• The question of salary didn't come up until my second interview.

Come up with 表示想出点子或计划，主语是主动提出想法的人，而不是自己出现的话题。比较：The question came up at the meeting, and Lena came up with a solution。