—Would you like me        the radio a bit?

—No, it’s all right. I’m used        with the radio        .

A．to turn down; to work; on

B．turning down; to working; on

C．turning down; to working; off

D．to turn down; to working; on

自动变速器选用D档位后可以自动升挡和降档，档升挡扭矩和传动比（）的档位

A、不变

B、为1

C、减小

D、增大