We are satisfied with his job in our company. Everything goes better now than when he         his work here.

A．has started

B．would start

C．started

D．had started

男性，65岁。因上腹不适、腹胀2个月就医。CT发现肝左叶8cm大小占位，提示为海绵状血管瘤，乙肝两对半阴性，肿瘤标志物阴性，肝功能正常。该病最危险的并发症是（）

A.癌变

B.肝衰竭

C.高位肠梗阻

D.破裂大出血

E.上消化道出血