I told Sally how to get there, but perhaps I for her.
A. had to write it out
B. must have written it out
C. should have written it out
D. need to have written it out
网友回答
A. had to write it out
B. must have written it out
(答案→)C. should have written it out
D. need to have written it out
解析：考查情态动词+完成式的用法：句意：我告诉Sally怎么到这儿，但是可能我应该把它写下来。本应该做而没做should have done，must have done过去一定做了，need 后面直接接have done，没有to，选C。