问题补充：
— May I come in? Im sorry I am late.
— Come in, please. But could you please tell me ?
A. how do you come to school
B. what were you doing then
C. who you talked with
D. why you are late again
答案：
A. how do you come to school
B. what were you doing then
C. who you talked with
(答案→)D. why you are late again
解析：宾语从句的用法。由宾语从句用陈述句的语序可排除选项A、C，又由上句“我迟到了”知，宾语从句意为“你为什么迟到了”，因此选D。
