Let me tell you what happened to my homework.
OK, go ahead--what is the excuse THIS time?
Actually, I did it, but then it got lost.
Could you have gotten it done at another time?
Yes, I could.
You have never missed an assignment before--when will you be making this one up?
I'll make it up early next week.
That would work, but don't let it happen again.
I'll try.
That will solve it then. Let's work hard to not let it happen again.