1. The bag is ______________ the bed. 2. The desk is ______________ the bed. 3. The pencil is ______________ the pencil-box. 4. The dog is ______________ the chair. 5. The books are ______________ the desk.
看图填入适当的介词。
Look at the picture. The ball is the desk. The ruler is the desk. The backpack is the desk. The pingpong ball is the bag. The pen is the desk.