某人刻苦学习英语，终有小成。一日上街不慎与一老外相撞， 忙说：I am sorry.老外应道：I am sorry too.

某人刻苦学习英语，终有小成。一日上街不慎与一老外相撞， 忙说：I am sorry.

老外应道：I am sorry too.

某人听后又道：I am sorry three.

老外不解，问：What are you sorry for?

某人无奈，道：I am sorry five!