下列哪些内容是异常的含义

A． 程序的语法错

B． 程序在编译和运行中所发生的异常事件

C． 程序预先定义好的异常事件

D． 程序编译错误

Few of them came to the city,              ?[ ]

A. don't they  

B. do they  

C. didn't they    

D. did they