| A．What’s in the classroom? | B．Where’s in the classroom? |
| A．Let’s clean the desk. | B．Let me clean the chair. | C．Let me clean the window. |
| A．Let me clean the classroom. | B．Let’s clean the classroom. | C．Let’s clean the window. |
| A．One blackboard, one computer and many desks and chairs. |
| B．It’s in your desk. |
| C．Thank you. |
| D．Four. |
| 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? |
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