－Could you come back home at five? 　

－______. I have something important to do at school at ten past five. [ ]

A. I'm afraid not.

B. I'm afraid so.

C. Yes, I hope so.

D. I don't care.

引起病毒性肝炎相关性再生障碍性贫血的肝炎类型，就目前所知以哪型肝炎居多数（）

A.甲型肝炎

B.乙型肝炎

C.非甲非乙型肝炎

D.巨细胞病毒性肝炎

E.EB病毒性肝炎