ItoldSallyhowtogetthere,butperhapsI

问题详情：

    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

【回答】

C

知识点：虚拟语气与情态动词

题型：选择题