I'm terribly sorry for being late, The traffic is murder out there.
I'm very sorry I quickly so much that i had forgotten it.I'm sorry I was really looking forward to pick up you, but something has come up.
I'm sorry i have a sick last night so i don't have energy to do homework.
I apologize for broke your cellphone and now i regret it.i don't hold it good enough,it's my fault.