－What made little Tony so unhappy and cry in his room?                      

－____to go hiking with his brother.   [ ]

A．Having not been allowed

B．Not having allowed    

C．Having not allowed    

D．Not having been allowed

带电拨插打印机信号电缆线，不会导致（）。

A、破坏打印机驱动程序

B、打印机内部芯片损坏

C、计算机并行口损坏

D、计算机死机