1) I emailed it to you, but I’m not sure if you got it as you didn’t reply?
2) I was doing some revision this morning and left my book on the breakfast table, sorry.
3) I was staying at my nan’ s house so couldn’t get my books for today’s classes.
4) I wasn’t in the last lesson, so I didn’t get the homework.
5) I was busy doing a big project due in today for *name anotherteacher that they don’t get on with*