--- Who’s the man over there?

　--- It’s Jack.

　--- Oh? ______ in Italy.

A．I think he’s

B．I’ve thought he’s been

C．I thought he was

D．I’d thought he’d been

哪型肝炎病毒属缺陷病毒【 】

A．甲型肝炎病毒

B．乙型肝炎病毒

C．丙型肝炎病毒

D．丁型肝炎病毒

E．戊型肝炎病毒