介绍学校布局的短文表达 — 英语填空题

从方框中选词填空，补全介绍学校布局的短文。（每词限用一次） 方框：in, on, under, where My school is small but nice. There is a big tree ___ front of the classroom building. Look! Some books are ___ the desk, and a ball is ___ it too. — ___ is the library? — It's next to the dining hall.