He is an hour late by now．He         last night．

A．must stay up

B．should stay up

C．should have stayed up

D．must have stayed up

原发性肝癌手术切除的禁忌证()

A．并发有肝硬化

B．肿瘤已侵及肝门

C．临床上有明显黄疸、腹水

D．已累及半肝以上

E．合并肿瘤远处转移