on, in, under
① Where is my bag? a. I'm from Canada.
②Is your pencil box on the chair? b. OK!
③What's this? c. It's in your desk.
④Where are you from? d. No, it isn't.
⑤Let's go to school. e. It's a toy bear.
This is my room (房间).I have a new desk and a chair.The book is on the desk.The ruler is under the book.My eraser is in the pencil box.My bag is on the chair.Where's my cat? It's under the chair.It's sleeping (睡觉).