1 - Sorry I didn't do my homework last night. I had to visit my grandparents.
- It's OK. Don't worry.
2 - I'm sorry I missed that goal, my leg got a really bad cramp. (crampă)
- It's fine. Doesn't matter.
3 - Sorry I forgot to phone you. I was outside.
- It's OK. Doesn't matter now.
4 - I'm sorry I don't have my maths textbook, I left it on my desk at home
- It's OK. Don't worry.