_______ into many languages, Harry Potter is popular with children and adults as well all over the world.   [      ]

A. Having been translated 

B. Being translated  

C. Having translated  

C. To be translated

当雷云对地放电或与其他异性雷云中和放电后，在架空线路上的束缚电荷被释放而形成自由电荷，向线路两端泄放，形成电位很高的感应过电压，称为“（）”。