| A．You're welcome. |
| B．No，thanks. |
| A．Thank you！ |
| B．See you！ |
| A．Fine，thank you. |
| B．I'm fourteen. |
| A． You can go by bike. |
| B． You can not by a bike. |
| C． You can go by the bike. |
| A．I always go by train. |
| B．Sometimes I go by train. |
| C．I usually go by subway. |
| A．You're welcome. |
| B．No，thanks. |
| C．Thanks. |
| A．How old are you？ |
| B．How do you go to school？ |
| C．How do you do? |
| A．Thank you |
| B．See you |
| C．OK |
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