Please turn down the music, _________our neighbors next door will be disturbed.

         A．and                               B．or                                  C．but                                 D．so

 Please turn down the music,        our neighbors next door will be disturbed.

    A．and              B．or               C．but              D．so

Please turn down the music, _________our neighbors next door will be disturbed.

       A．and                       B．or                          C．but                         D．so

Please turn down the music, ______our neighbors next door will be disturbed.

       A．and B．or     C．but    D．so

Please turn down the music, _______our neighbors next door will be disturbed.

       A．and B．or     C．but    D．so

Please turn down the music,      our neighbors next door will be disturbed.

A．and          B．or           C．but           D．so

Please turn down the music, 　　　 our neighbors next door will be disturbed.

A．and 　　　　　 B．or 　　　　　 C．but　　　　　 D．so

Please turn down the music,　　 our neighbors next door will be disturbed.

　 A．and 　 B．or C．but D．so

第二部分：知识运用（共两节，45分）

第一节  单项填空（共15小题；每小题1分，共15分）

从每题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

21．Please turn down the music, _______our neighbors next door will be disturbed.

       A．and B．or     C．but    D．So