11．What is the probable relationship between the two speakers?

A．Doctor and patient．      B．Boss and clerk．            C．Teacher and student．

9．A．Because she is busy．

B．Because her computer doesn’t work．

C．Because she’s too tired．

8．A．For 20 years．               B．For 1 year．               C．For 2 years．

7．A．December．                 B．January．                   C．February．

6．A．By plane．                   B．By train．                         C．By car．

4．A．10 yuan．                    B．Yes, I’ll take it．         C．No, thank you．

3．A．Of course．                     B．It doesn’t matter．      C．All right．

2．A ．That's true．                  B．Go down this street．    C．Good idea．