Fill in each blank with ONE suitable preposition to complete the passage.
We have English lessons Room 12. There are 24 tables for students and a desk for the teacher. the walls, there are a lot of posters. There are a TV and a DVD player the front of the room for us to watch films sometimes. There are some bookshelves the classroom. the shelves, there are lots of English books. Out notebooks are the teacher's desk. He is checking our homework. My schoolbag is the floor and there is some food the bag.
It's now 5.30 pm. We are now home but our teacher is still school. He often stays late to prepare lessons for the next day.