Dear B2 students,
I'm writing to tell you that I'll be late tomorrow for your exam, so don't worry if you don't see me.
Margarita will be with B2-C in our classroom and Patricia with B2-D in class 1-15. Please, bring your ID with you!
Be relaxed and concentrate a lot in you reading and listening tests!! Read the instructions carefully too.
I think I'll be there at about 18:00 anyway.
Take care and GOOD LUCK!