| A．Good evening, Sam. | B．Good morning, Sam. |
| A．Good morning. | B．Good afternoon. |
| A．Is it three yuan? | B．How much is it? | C．How many is it? |
| A．Good afternoon. | B．Good morning. | C．Thank you. |
| A．Good afternoon. | B．Good morning. | C．Hello. |
| A．Good morning. | B．Good afternoon. |
( )| A．—Good morning, Miss Li. —Morning. | B．—Goodbye, Miss Li. —Bye. |
( )| A．—Good morning. —Good morning. | B．—Good afternoon. —Good afternoon. |
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