急性胆囊炎最严重的并发症是

A．细菌性肝脓肿

B．胆囊积脓

C．胆囊坏疽穿孔

D．并发急性胰腺炎

E．胆囊十二指肠内瘘

He speaks ________ fast ________ I can’t follow him．

A．so；that

B．such；that

C．so；as to

D．enough；that