装箱工处理推杆故障要关断（）。
A、电源
B、设备
C、气源
D、空压
参考答案：C
---I must be off now, or it will be too late to see Tom.
---_______? Do you really want to see that dull boy?
A．For him
B．Why so
C．For what
D．So what
