A.Sit down, please. | B.Stand up, please. |
A.Look at your books. | B.Look at the blackboard. |
A.Yes, Miss Li. | B.I'm sorry, Miss Li. |
A.It's a rubber. | B.It's a robot. |
A. Come in, please. B. It's a blackboard. C. How nice! D. Good morning, class. E. It's brown. |