— Could you tell me ____ for the meeting yesterday?

— Because the traffic was bad. [ ]

A. why did you come late

B. why you came late

C. why do you come late

D. why you come late

在文档窗口中插入空格的操作有式化（）

A、在中文的全角状态下按空格键

B、插入一个透明的图

C、选择插入菜单下的不换行空格

D.CTRL+SHIFT+空格键加入