| A．Don’t litter. | B．Don’t walk. |
| A．No food. | B．No parking. |
| A．No smoking. | B．Don’t talk. |
| A．No cameras. | B．I’m sorry. |
| A．Open your book. | B．Take out your book. |
| A．No climbing. | B．Don’t walk. |
| A．Don’t litter. | B．Don’t worry. |
| A．Open your book. | B．Close your book. |
| A．严禁吸烟。 | B．严禁饮食。 |
| A．No climbing. | B．No smoking. |
搜索
