ItoldSallyhowtogetthere,butperhapsI

問題詳情：

    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

知識點：虛擬語氣與情態動詞

題型：選擇題