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 答案： C 解析: 根据句意“我已经告诉她怎样到那儿，但是或许我应该给她写下来”可知，说话者含有“后悔、遗憾”的意味，应使用“情态动词+完成式”形式，“must+完成式”表示对过去的肯定推测，“should+完成式”才表示虚拟意义。

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