--Have you read _____book called “Harry Potter”?

--Yeah, and I want to read it _______second time.

A．a; the

B．the; the

C．a; a

D．the; a

以下哪项疾病自然病程预后极差（）

A.中心性浆液性脉络膜视网膜病变

B.Coats病

C.Stargardt病

D.非缺血型视网膜中央静脉阻塞

E.黄斑囊样水肿