I found out I had an unexpected pimple, so I asked my parents to call the school to tell them that I will be sick
You felt that embarrassed that you wanted to miss school for a pimple?
To avoid the test tomorrow. It's very important for my study progress.
It is wrong to like about trivial medical issues. A pimple is not serious enough to miss school for embarrassment.
I disagree, I need more time to study.
I'm sure your parents will understand if you tell them the truth. You should make more time to study if the tests mean that much to your grades. Sometimes you have to sacrifice fun and friends to do better in school.