骨骼肌瘫痪，并导致萎缩的原因是（　　）

A．肌细胞失去营养供给

B．肌腱被破坏

C．控制骨骼肌的神经受损

D．肌细胞死亡

－Tom, who taught          Chinese before you came to China?

－Nobody. I learned it by        .

A．your; myself

B．his; himself

C．you; myself

D．him; himself