Xiaoming borrowed an eraser from Xiaoli in class, but the teacher thought they were playing a prank.

Listen to the teacher carefully in class, and don't make small moves that have nothing to do with classroom teaching. Eraser belongs to the most basic school supplies in class, which requires students to prepare before class. This is a study habit developed from the first year of high school. Even if Xiaoming did borrow an eraser from his classmates, the teacher would probably think that Xiaoming was deserting and deliberately doing something unrelated to his study. It's best not to explain anything to the teacher, but to apologize clearly to the teacher and promise not to make mistakes in the future.