| A．am | B．is | C．are |
| A．sister | B．brother | C．father |
| A．am | B．is | C．Are |
| A．Yes, it is. | B．Yes, it isn’t. | C．No, it is. |
| A． Don’t touch. |
| B． Don’t swim. |
| C． No bikes. |
| A． Look left. |
| B． Look right. |
| C． Look up. |
| A． No bikes. |
| B． No swimming. |
| C． No cameras. |
| A．No swimming. |
| B．No parking. |
| C．No bikes. |
| A．Don’t make noise. |
| B．Don’t hit others. |
| C．Don’t climb the trees. |
| A．Look left. |
| B．Don’t worry. |
| C．Thank you. |
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