1. Hang the picture on the blackboard
2. The teacher is standing at the blackboard
3.He is writing on the blackboard
4. The pupils are siting at the desk
5. They are writing text in their exercise books
1. Hang the picture on the blackboard
2. The teacher is standing at the blackboard
3.He is writing on the blackboard
4. The pupils are siting at the desk
5. They are writing text in their exercise books