---------Good morning ，_____________ .
----------Good morning , Miss liu .
| A．a boy and a girl |
| B．boy and girl . |
| C．boys and girls |
| D．a boy and the girl |
---------Good morning ，_____________ .
----------Good morning , Miss liu .
| A．a boy and a girl |
| B．boy and girl . |
| C．boys and girls |
| D．a boy and the girl |
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