A: Well, now you're really going to be mad when I tell you who got 100% on the final exam. I forgot her name... the one who always kisses up to the teacher.
B: Jennifer davies? You're kidding! How could she possibly get 100% on it when she keeps cutting class all the time?
A: She's the teacher's pet, that's why.
e.g. She was the teacher's pet until she blotted her copybook by failing all her examinations.
e.g. He seems to be able to do what he likes because he's the teacher's pet.
e.g. Jane is the teacher’s pet, so the teacher isn't fair——she always gives the highest marks to her.
1. kiss up to：拍某人的怕屁，给某人献殷情
e.g. He's always kissing up to the teacher, so it isn't surprising that no one else in the class likes him.
e.g. The boss doesn't like it when people kiss up to her like that.
Peter like to kiss up to the boss. He always tattles on other co-workers!
2. cut class：旷课，逃学
e.g. If you don't lend it to me, I'll tell Mom and Dad that you cut class last week.
e.g. This class is a real drag. Let's cut class.
英：That is why.
英：I get 100% on the exam.
英：You are kiding.