— Can you finish the book in ________ month or two?

— Yes, it’s out of ________ question.

A．a; the

B．the; 不填

C．the; a

D．a; 不填

疯牛病的病原体是

A．埃博拉病毒

B．朊病毒

C．尼巴病毒

D．汉坦病毒

E．柯萨其病毒