【题目】I told Sally how to get here, but perhaps I ___ for her.
A. had to write it out
B. must have written it out
C. should have written it out
D. ought to write it out
在线课程【答案】C
【解析】该题中 should have done表示“过去本应该做某事，而实际上没有做”。 该题的意思是“我告诉Sally怎么到这儿， 可是我本应该为她写出这里的详细地址。”表达了一种懊悔的心情。