[1994全国] 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 题目和参考答案——青夏教育精英家教网—

题目内容

21.[1994全国] 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
提示：

题目考察表达与过去事实相反时虚拟语气的构成——should have done

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