| A．Let’s clean the desk. | B．Let me clean the chair. | C．Let me clean the window. |
| A．Let me help you. | B．Let you help me. | C．Let’s help each other. |
| A．Close your book. | B．Open my book. | C．Open your book. |
| A．Who's that? |
| B．Who's this? |
| C．What's in the box? |
| A．The wall is green. |
| B．The wall is yellow. |
| A．I’m Li Mei . |
| B．Hello ! Li Mei . |
| C．This is Li Mei . |
| A．How are you? | B．Good afternoon ! | C．Hello! |
| A．Who’s this boy? | B．Who’s that boy? |
| C．Who’s that girl? |
| A．Let’s clean the desk. |
| B．Let me clean the desk. |
| C．Let me clean the chair. |
| A．Let me clean the classroom. |
| B．Let’s clean the classroom. |
| C．Let’s clean the window. |
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