| A．This is your book. | B．Is this a book? | C．Is this your book? |
| A．Don’t talk. | B．Don’t run. | C．Don’t shout. |
| A．Come in, please. | B．I’m sorry, Miss Li. | C．Open the door, please. |
| A．Open the window, please. | B．Open the door, please. |
| A．Don't run. | B．Don't walk. |
| A．I'm too bad. | B．I'm sorry. |
| A．Don't run. | B．Don't talk. |
| A．Yes. | B．I’m sorry. | C．Thank you. |
| A．OK. | B．I’m sorry. | C．Thank you. |
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