| A．Yes, Mr Green | B．I’m sorry, Miss Li. |
| A．It’s a rubber. | B．What’s this ? |
| A．Open the door. | B．Don’t open the door. |
| A．Open the door, please. | B．Open the window, please. |
| A．Close the window. | B．Open the window. |
| A．Close the door. | B．Thank you. |
| A．Stand up. | B．Sit down. |
| A．Come in, please. | B．I’m sorry, Miss Li. |
| A．Gao Shan, please open the book. |
| B．Yes ,Mr Green. |
| C．Good morning, class. |
| D．Stand up. |
| D | | | | | | |
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