“宰相之职，佐天子总百官，治万事，其任重矣。”以下各朝官职中，其职权与引文所述的官职相符的是  [ ]

A．秦朝御史大夫

B．唐朝尚书令

C．明朝内阁首辅

D．清朝军机大臣

-I didn’t do well in the exam yesterday. Of course I _________ for it.

-Oh, your poor thing! But I think you should learn a lesson.[ ]

A. hadn’t prepared  

B. haven’t prepared  

C. didn’t prepare  

D. wouldn’t prepare