Mom: Stella? It’s your mother. I’m worried about you. You haven’t called for a while.Stella: Oh, hi, Mom. I’m f ne. I’ve been busy, that’s all.Mom: What are your classes like this year? I hope they’re better than last year.Stella: Yes, they are. The teachers are great. It’s more interesting than last year, and a lot more fun!Mom: Remember, your f nal exams are at the end of the year. Are you studying hard?Stella: Of course I am, Mom. I have less free time now, and the classes are more diff cult. Mom: You’re lucky. Life was harder when I was young. I never went to college. I had to stay at home.Stella: Mom, please. Not again. It’s not as easy as you think, you know.Mom: You should study harder! It’s not a vacation. You have to get the best grades.Stella: OK, OK, I’ll try …Mom: Hey, what’s that noise?Stella: Er … We’re having a dorm party.Mom: What? A party?